/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SHALLOWEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/list-ext2-properties/simple_search_value-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 01:15:33,734 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 01:15:33,737 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 01:15:33,774 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 01:15:33,775 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 01:15:33,777 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 01:15:33,778 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 01:15:33,781 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 01:15:33,783 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 01:15:33,785 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 01:15:33,786 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 01:15:33,788 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 01:15:33,788 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 01:15:33,790 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 01:15:33,791 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 01:15:33,793 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 01:15:33,794 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 01:15:33,795 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 01:15:33,797 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 01:15:33,800 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 01:15:33,802 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 01:15:33,804 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 01:15:33,806 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 01:15:33,807 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 01:15:33,815 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 01:15:33,816 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 01:15:33,816 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 01:15:33,820 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 01:15:33,821 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 01:15:33,825 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 01:15:33,825 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 01:15:33,826 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 01:15:33,829 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 01:15:33,830 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 01:15:33,831 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 01:15:33,832 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 01:15:33,833 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 01:15:33,834 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 01:15:33,834 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 01:15:33,835 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 01:15:33,836 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 01:15:33,837 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-27 01:15:33,898 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 01:15:33,898 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 01:15:33,901 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 01:15:33,901 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 01:15:33,901 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 01:15:33,902 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 01:15:33,902 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 01:15:33,902 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 01:15:33,903 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 01:15:33,903 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 01:15:33,904 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 01:15:33,904 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 01:15:33,904 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 01:15:33,904 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 01:15:33,905 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 01:15:33,905 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 01:15:33,905 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 01:15:33,905 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 01:15:33,906 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 01:15:33,906 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 01:15:33,906 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 01:15:33,906 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 01:15:33,907 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 01:15:33,907 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 01:15:33,907 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 01:15:33,907 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 01:15:33,907 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 01:15:33,908 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 01:15:33,908 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 01:15:33,908 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 01:15:34,444 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 01:15:34,493 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 01:15:34,497 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 01:15:34,498 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 01:15:34,499 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 01:15:34,501 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/list-ext2-properties/simple_search_value-2.i [2020-10-27 01:15:34,585 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/825bdb76d/dbd1f7adb8a942f28dfa13794d2fda2b/FLAG676f290fa [2020-10-27 01:15:35,349 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 01:15:35,349 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/list-ext2-properties/simple_search_value-2.i [2020-10-27 01:15:35,368 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/825bdb76d/dbd1f7adb8a942f28dfa13794d2fda2b/FLAG676f290fa [2020-10-27 01:15:35,641 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/825bdb76d/dbd1f7adb8a942f28dfa13794d2fda2b [2020-10-27 01:15:35,644 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 01:15:35,652 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 01:15:35,658 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 01:15:35,659 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 01:15:35,663 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 01:15:35,664 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 01:15:35" (1/1) ... [2020-10-27 01:15:35,670 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7052ded9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:15:35, skipping insertion in model container [2020-10-27 01:15:35,671 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 01:15:35" (1/1) ... [2020-10-27 01:15:35,681 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 01:15:35,754 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 01:15:36,084 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 01:15:36,095 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 01:15:36,148 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 01:15:36,228 INFO L208 MainTranslator]: Completed translation [2020-10-27 01:15:36,229 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:15:36 WrapperNode [2020-10-27 01:15:36,229 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 01:15:36,230 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 01:15:36,230 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 01:15:36,230 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 01:15:36,244 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:15:36" (1/1) ... [2020-10-27 01:15:36,244 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:15:36" (1/1) ... [2020-10-27 01:15:36,260 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:15:36" (1/1) ... [2020-10-27 01:15:36,261 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:15:36" (1/1) ... [2020-10-27 01:15:36,278 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:15:36" (1/1) ... [2020-10-27 01:15:36,284 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:15:36" (1/1) ... [2020-10-27 01:15:36,287 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:15:36" (1/1) ... [2020-10-27 01:15:36,294 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 01:15:36,296 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 01:15:36,296 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 01:15:36,296 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 01:15:36,297 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:15:36" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 01:15:36,379 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 01:15:36,379 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 01:15:36,379 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 01:15:36,380 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2020-10-27 01:15:36,380 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2020-10-27 01:15:36,380 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2020-10-27 01:15:36,380 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 01:15:36,380 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 01:15:36,380 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 01:15:36,380 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-27 01:15:36,381 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-27 01:15:36,381 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 01:15:36,381 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 01:15:36,381 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-27 01:15:36,381 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-10-27 01:15:36,381 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-10-27 01:15:36,381 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-10-27 01:15:36,382 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-10-27 01:15:36,382 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-10-27 01:15:36,382 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-10-27 01:15:36,382 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-10-27 01:15:36,382 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-10-27 01:15:36,382 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-10-27 01:15:36,383 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-10-27 01:15:36,383 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-10-27 01:15:36,383 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-10-27 01:15:36,383 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-10-27 01:15:36,383 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-10-27 01:15:36,383 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-10-27 01:15:36,383 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-10-27 01:15:36,384 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2020-10-27 01:15:36,384 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2020-10-27 01:15:36,384 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-10-27 01:15:36,384 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-10-27 01:15:36,384 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-10-27 01:15:36,384 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-10-27 01:15:36,385 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-10-27 01:15:36,385 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-10-27 01:15:36,385 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-10-27 01:15:36,385 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-10-27 01:15:36,385 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-10-27 01:15:36,385 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-10-27 01:15:36,385 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-10-27 01:15:36,385 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-10-27 01:15:36,386 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-10-27 01:15:36,386 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-10-27 01:15:36,386 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-10-27 01:15:36,386 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-10-27 01:15:36,386 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-10-27 01:15:36,386 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-10-27 01:15:36,386 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-10-27 01:15:36,387 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-10-27 01:15:36,387 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-10-27 01:15:36,387 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-10-27 01:15:36,387 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-10-27 01:15:36,387 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-10-27 01:15:36,387 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-10-27 01:15:36,388 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-10-27 01:15:36,388 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-10-27 01:15:36,388 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-10-27 01:15:36,388 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-10-27 01:15:36,388 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-10-27 01:15:36,388 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-10-27 01:15:36,389 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-10-27 01:15:36,389 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-10-27 01:15:36,389 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-10-27 01:15:36,389 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-27 01:15:36,389 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-10-27 01:15:36,389 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-10-27 01:15:36,389 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-10-27 01:15:36,390 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-10-27 01:15:36,390 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-10-27 01:15:36,390 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-10-27 01:15:36,390 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-10-27 01:15:36,391 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-10-27 01:15:36,391 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-10-27 01:15:36,391 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-10-27 01:15:36,391 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-10-27 01:15:36,391 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-27 01:15:36,391 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-10-27 01:15:36,391 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-10-27 01:15:36,392 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-10-27 01:15:36,392 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-10-27 01:15:36,392 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-10-27 01:15:36,394 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-10-27 01:15:36,394 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-10-27 01:15:36,394 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-10-27 01:15:36,394 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-10-27 01:15:36,394 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-10-27 01:15:36,394 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-10-27 01:15:36,395 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-10-27 01:15:36,395 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-10-27 01:15:36,395 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-10-27 01:15:36,395 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-10-27 01:15:36,395 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-10-27 01:15:36,395 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-10-27 01:15:36,395 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-10-27 01:15:36,396 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-10-27 01:15:36,396 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-10-27 01:15:36,396 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-10-27 01:15:36,396 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-10-27 01:15:36,396 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-10-27 01:15:36,396 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-10-27 01:15:36,397 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-10-27 01:15:36,397 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-10-27 01:15:36,397 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-10-27 01:15:36,398 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-10-27 01:15:36,398 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-10-27 01:15:36,398 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-10-27 01:15:36,398 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-10-27 01:15:36,398 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-10-27 01:15:36,398 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-10-27 01:15:36,398 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-10-27 01:15:36,399 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-10-27 01:15:36,399 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-10-27 01:15:36,399 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-10-27 01:15:36,399 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-10-27 01:15:36,400 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-10-27 01:15:36,401 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2020-10-27 01:15:36,401 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 01:15:36,401 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-27 01:15:36,402 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 01:15:36,402 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-10-27 01:15:36,402 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-10-27 01:15:36,402 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 01:15:36,402 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 01:15:36,402 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 01:15:36,403 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 01:15:36,403 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 01:15:36,868 INFO L751 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2020-10-27 01:15:37,009 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 01:15:37,009 INFO L298 CfgBuilder]: Removed 2 assume(true) statements. [2020-10-27 01:15:37,011 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 01:15:37 BoogieIcfgContainer [2020-10-27 01:15:37,011 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 01:15:37,013 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 01:15:37,014 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 01:15:37,017 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 01:15:37,018 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 01:15:35" (1/3) ... [2020-10-27 01:15:37,019 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39bca037 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 01:15:37, skipping insertion in model container [2020-10-27 01:15:37,019 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:15:36" (2/3) ... [2020-10-27 01:15:37,019 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39bca037 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 01:15:37, skipping insertion in model container [2020-10-27 01:15:37,020 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 01:15:37" (3/3) ... [2020-10-27 01:15:37,021 INFO L111 eAbstractionObserver]: Analyzing ICFG simple_search_value-2.i [2020-10-27 01:15:37,034 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 01:15:37,040 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 01:15:37,055 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 01:15:37,085 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 01:15:37,085 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 01:15:37,085 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 01:15:37,086 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 01:15:37,086 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 01:15:37,086 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 01:15:37,086 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 01:15:37,086 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 01:15:37,106 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states. [2020-10-27 01:15:37,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-27 01:15:37,114 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:15:37,115 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:15:37,115 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:15:37,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:15:37,123 INFO L82 PathProgramCache]: Analyzing trace with hash -297690078, now seen corresponding path program 1 times [2020-10-27 01:15:37,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:15:37,134 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [280257050] [2020-10-27 01:15:37,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:15:37,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:15:37,309 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:15:37,389 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:15:37,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:15:37,889 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:15:37,889 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-27 01:15:37,889 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 01:15:37,889 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 607 [2020-10-27 01:15:37,892 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:15:37,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 01:15:37,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:15:37,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 01:15:37,893 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 01:15:37,992 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:15:37,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:15:37,999 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:15:38,007 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:15:38,007 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:15:38,007 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:15:38,008 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 01:15:38,008 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:15:38,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:15:38,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:15:38,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:15:38,009 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:15:38,018 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:15:38,019 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [280257050] [2020-10-27 01:15:38,021 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:15:38,022 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 01:15:38,023 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280424483] [2020-10-27 01:15:38,028 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 01:15:38,028 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:15:38,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 01:15:38,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 01:15:38,047 INFO L87 Difference]: Start difference. First operand 36 states. Second operand 5 states. [2020-10-27 01:15:38,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:15:38,249 INFO L93 Difference]: Finished difference Result 66 states and 90 transitions. [2020-10-27 01:15:38,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 01:15:38,252 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2020-10-27 01:15:38,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:15:38,262 INFO L225 Difference]: With dead ends: 66 [2020-10-27 01:15:38,262 INFO L226 Difference]: Without dead ends: 35 [2020-10-27 01:15:38,269 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-27 01:15:38,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-10-27 01:15:38,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 25. [2020-10-27 01:15:38,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-10-27 01:15:38,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2020-10-27 01:15:38,315 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 15 [2020-10-27 01:15:38,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:15:38,316 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2020-10-27 01:15:38,316 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 01:15:38,316 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2020-10-27 01:15:38,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-27 01:15:38,317 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:15:38,317 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:15:38,318 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 01:15:38,318 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:15:38,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:15:38,319 INFO L82 PathProgramCache]: Analyzing trace with hash -1285728602, now seen corresponding path program 1 times [2020-10-27 01:15:38,320 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:15:38,320 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [553894991] [2020-10-27 01:15:38,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:15:38,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:15:38,375 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:15:38,409 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:15:38,441 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:15:38,481 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:15:38,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:15:38,732 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:15:39,761 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:15:39,762 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-27 01:15:39,762 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 01:15:39,762 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1418 [2020-10-27 01:15:39,763 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:15:39,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 01:15:39,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 01:15:39,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-27 01:15:39,764 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 01:15:39,936 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:15:39,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:15:39,946 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:15:39,951 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:15:39,951 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:15:39,951 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:15:39,952 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 01:15:39,952 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:15:39,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:15:39,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:15:39,953 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:15:39,954 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-27 01:15:39,965 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:15:39,966 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [553894991] [2020-10-27 01:15:39,966 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:15:39,966 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 01:15:39,967 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605403947] [2020-10-27 01:15:39,969 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 01:15:39,972 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:15:39,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 01:15:39,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 01:15:39,983 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand 6 states. [2020-10-27 01:15:40,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:15:40,138 INFO L93 Difference]: Finished difference Result 46 states and 56 transitions. [2020-10-27 01:15:40,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 01:15:40,139 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 22 [2020-10-27 01:15:40,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:15:40,140 INFO L225 Difference]: With dead ends: 46 [2020-10-27 01:15:40,140 INFO L226 Difference]: Without dead ends: 36 [2020-10-27 01:15:40,142 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-10-27 01:15:40,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-10-27 01:15:40,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 33. [2020-10-27 01:15:40,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-10-27 01:15:40,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 40 transitions. [2020-10-27 01:15:40,154 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 40 transitions. Word has length 22 [2020-10-27 01:15:40,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:15:40,155 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 40 transitions. [2020-10-27 01:15:40,155 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 01:15:40,155 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 40 transitions. [2020-10-27 01:15:40,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-27 01:15:40,156 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:15:40,156 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:15:40,157 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 01:15:40,157 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:15:40,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:15:40,159 INFO L82 PathProgramCache]: Analyzing trace with hash 489278760, now seen corresponding path program 1 times [2020-10-27 01:15:40,159 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:15:40,159 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1353306864] [2020-10-27 01:15:40,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:15:40,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:15:40,190 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:15:40,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:15:40,231 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:15:40,428 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:15:40,428 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-27 01:15:40,428 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 01:15:40,429 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 243 [2020-10-27 01:15:40,429 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:15:40,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 01:15:40,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 01:15:40,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-27 01:15:40,430 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:15:40,471 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:15:40,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:15:40,479 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:15:40,489 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:15:40,490 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:15:40,490 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:15:40,490 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-27 01:15:40,490 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:15:40,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:15:40,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:15:40,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:15:40,491 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:15:40,496 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 01:15:40,497 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1353306864] [2020-10-27 01:15:40,497 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:15:40,497 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 01:15:40,497 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122528748] [2020-10-27 01:15:40,499 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 01:15:40,499 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:15:40,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 01:15:40,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 01:15:40,502 INFO L87 Difference]: Start difference. First operand 33 states and 40 transitions. Second operand 5 states. [2020-10-27 01:15:40,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:15:40,592 INFO L93 Difference]: Finished difference Result 54 states and 67 transitions. [2020-10-27 01:15:40,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 01:15:40,592 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 22 [2020-10-27 01:15:40,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:15:40,593 INFO L225 Difference]: With dead ends: 54 [2020-10-27 01:15:40,593 INFO L226 Difference]: Without dead ends: 31 [2020-10-27 01:15:40,594 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-27 01:15:40,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-10-27 01:15:40,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 28. [2020-10-27 01:15:40,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-27 01:15:40,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2020-10-27 01:15:40,601 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 22 [2020-10-27 01:15:40,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:15:40,602 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2020-10-27 01:15:40,602 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 01:15:40,602 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2020-10-27 01:15:40,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-27 01:15:40,603 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:15:40,603 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:15:40,603 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 01:15:40,604 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:15:40,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:15:40,604 INFO L82 PathProgramCache]: Analyzing trace with hash -778698823, now seen corresponding path program 1 times [2020-10-27 01:15:40,604 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:15:40,605 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [239557147] [2020-10-27 01:15:40,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:15:40,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:15:40,631 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:15:40,647 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:15:40,667 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:15:40,782 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:15:40,972 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:15:41,224 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:15:41,253 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:15:42,602 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:15:45,021 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:15:45,022 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-27 01:15:45,022 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-27 01:15:45,022 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4397 [2020-10-27 01:15:45,022 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:15:45,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 01:15:45,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:15:45,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-27 01:15:45,023 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:15:45,171 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:15:45,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:15:45,175 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:15:45,178 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:15:45,179 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:15:45,179 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:15:45,179 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:15:45,179 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:15:45,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:15:45,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:15:45,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:15:45,180 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:15:45,186 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:15:45,187 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [239557147] [2020-10-27 01:15:45,187 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:15:45,187 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-27 01:15:45,188 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593104117] [2020-10-27 01:15:45,188 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 01:15:45,188 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:15:45,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 01:15:45,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-10-27 01:15:45,190 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand 9 states. [2020-10-27 01:15:45,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:15:45,444 INFO L93 Difference]: Finished difference Result 57 states and 69 transitions. [2020-10-27 01:15:45,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 01:15:45,445 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 27 [2020-10-27 01:15:45,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:15:45,446 INFO L225 Difference]: With dead ends: 57 [2020-10-27 01:15:45,446 INFO L226 Difference]: Without dead ends: 52 [2020-10-27 01:15:45,447 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2020-10-27 01:15:45,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-10-27 01:15:45,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 40. [2020-10-27 01:15:45,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-27 01:15:45,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 48 transitions. [2020-10-27 01:15:45,456 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 48 transitions. Word has length 27 [2020-10-27 01:15:45,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:15:45,456 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 48 transitions. [2020-10-27 01:15:45,456 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 01:15:45,456 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 48 transitions. [2020-10-27 01:15:45,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-27 01:15:45,457 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:15:45,458 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:15:45,458 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 01:15:45,458 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:15:45,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:15:45,459 INFO L82 PathProgramCache]: Analyzing trace with hash -794343864, now seen corresponding path program 2 times [2020-10-27 01:15:45,459 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:15:45,459 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [614174250] [2020-10-27 01:15:45,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:15:45,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:15:45,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:15:45,507 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:15:45,537 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:15:45,978 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:15:46,179 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:15:46,258 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:15:46,731 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:15:49,564 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:15:49,564 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-27 01:15:49,564 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 01:15:49,565 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4086 [2020-10-27 01:15:49,565 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:15:49,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 01:15:49,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:15:49,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-27 01:15:49,565 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:15:49,771 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:15:49,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:15:49,775 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:15:49,778 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:15:49,779 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:15:49,779 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:15:49,779 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:15:49,779 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:15:49,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:15:49,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:15:49,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:15:49,780 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:15:49,787 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:15:49,788 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [614174250] [2020-10-27 01:15:49,788 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:15:49,788 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 01:15:49,788 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855741351] [2020-10-27 01:15:49,789 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 01:15:49,789 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:15:49,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 01:15:49,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-10-27 01:15:49,790 INFO L87 Difference]: Start difference. First operand 40 states and 48 transitions. Second operand 11 states. [2020-10-27 01:15:50,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:15:50,028 INFO L93 Difference]: Finished difference Result 59 states and 72 transitions. [2020-10-27 01:15:50,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 01:15:50,028 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 32 [2020-10-27 01:15:50,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:15:50,029 INFO L225 Difference]: With dead ends: 59 [2020-10-27 01:15:50,030 INFO L226 Difference]: Without dead ends: 45 [2020-10-27 01:15:50,030 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2020-10-27 01:15:50,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-10-27 01:15:50,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 42. [2020-10-27 01:15:50,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-27 01:15:50,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 49 transitions. [2020-10-27 01:15:50,038 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 49 transitions. Word has length 32 [2020-10-27 01:15:50,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:15:50,039 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 49 transitions. [2020-10-27 01:15:50,039 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 01:15:50,039 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 49 transitions. [2020-10-27 01:15:50,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-27 01:15:50,040 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:15:50,040 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:15:50,040 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 01:15:50,041 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:15:50,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:15:50,041 INFO L82 PathProgramCache]: Analyzing trace with hash -114285494, now seen corresponding path program 1 times [2020-10-27 01:15:50,041 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:15:50,042 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [842560125] [2020-10-27 01:15:50,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:15:50,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:15:50,067 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:15:50,091 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:15:50,248 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:15:50,790 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:15:51,356 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:15:51,356 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-27 01:15:51,356 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 01:15:51,357 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1297 [2020-10-27 01:15:51,357 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:15:51,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 01:15:51,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:15:51,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-27 01:15:51,358 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 01:15:51,535 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:15:51,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:15:51,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:15:51,546 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:15:51,546 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:15:51,546 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:15:51,546 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:15:51,547 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:15:51,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:15:51,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:15:51,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:15:51,547 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:15:51,557 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:15:51,557 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [842560125] [2020-10-27 01:15:51,559 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:15:51,559 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 01:15:51,559 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491465900] [2020-10-27 01:15:51,560 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 01:15:51,560 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:15:51,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 01:15:51,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-10-27 01:15:51,561 INFO L87 Difference]: Start difference. First operand 42 states and 49 transitions. Second operand 11 states. [2020-10-27 01:15:51,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:15:51,800 INFO L93 Difference]: Finished difference Result 57 states and 67 transitions. [2020-10-27 01:15:51,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 01:15:51,801 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 32 [2020-10-27 01:15:51,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:15:51,802 INFO L225 Difference]: With dead ends: 57 [2020-10-27 01:15:51,802 INFO L226 Difference]: Without dead ends: 45 [2020-10-27 01:15:51,803 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2020-10-27 01:15:51,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-10-27 01:15:51,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 44. [2020-10-27 01:15:51,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-27 01:15:51,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 50 transitions. [2020-10-27 01:15:51,818 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 50 transitions. Word has length 32 [2020-10-27 01:15:51,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:15:51,819 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 50 transitions. [2020-10-27 01:15:51,819 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 01:15:51,819 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 50 transitions. [2020-10-27 01:15:51,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-27 01:15:51,820 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:15:51,820 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:15:51,820 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 01:15:51,820 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:15:51,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:15:51,822 INFO L82 PathProgramCache]: Analyzing trace with hash 1660721868, now seen corresponding path program 1 times [2020-10-27 01:15:51,822 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:15:51,822 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [539026128] [2020-10-27 01:15:51,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:15:51,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:15:51,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:15:51,869 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:15:52,299 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:15:52,300 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-27 01:15:52,300 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:15:52,300 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 461 [2020-10-27 01:15:52,300 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:15:52,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 01:15:52,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:15:52,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-27 01:15:52,301 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:15:52,520 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:15:52,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:15:52,525 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:15:52,535 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:15:52,535 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:15:52,535 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:15:52,536 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-27 01:15:52,536 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:15:52,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:15:52,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:15:52,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:15:52,538 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-27 01:15:52,551 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:15:52,552 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [539026128] [2020-10-27 01:15:52,552 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:15:52,552 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 01:15:52,552 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38866070] [2020-10-27 01:15:52,553 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 01:15:52,553 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:15:52,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 01:15:52,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-10-27 01:15:52,555 INFO L87 Difference]: Start difference. First operand 44 states and 50 transitions. Second operand 11 states. [2020-10-27 01:15:52,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:15:52,863 INFO L93 Difference]: Finished difference Result 58 states and 66 transitions. [2020-10-27 01:15:52,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 01:15:52,863 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 32 [2020-10-27 01:15:52,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:15:52,865 INFO L225 Difference]: With dead ends: 58 [2020-10-27 01:15:52,865 INFO L226 Difference]: Without dead ends: 53 [2020-10-27 01:15:52,865 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2020-10-27 01:15:52,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-10-27 01:15:52,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 33. [2020-10-27 01:15:52,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-10-27 01:15:52,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2020-10-27 01:15:52,871 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 32 [2020-10-27 01:15:52,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:15:52,871 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2020-10-27 01:15:52,872 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 01:15:52,872 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2020-10-27 01:15:52,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-27 01:15:52,873 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:15:52,873 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:15:52,873 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 01:15:52,873 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:15:52,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:15:52,874 INFO L82 PathProgramCache]: Analyzing trace with hash 1381077884, now seen corresponding path program 1 times [2020-10-27 01:15:52,874 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:15:52,874 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1384057679] [2020-10-27 01:15:52,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:15:52,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:15:52,895 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:15:52,908 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:15:52,924 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:15:53,223 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:15:53,338 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:15:54,237 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:15:54,238 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-27 01:15:54,238 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 01:15:54,238 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1348 [2020-10-27 01:15:54,238 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:15:54,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 01:15:54,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:15:54,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-27 01:15:54,239 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:15:54,468 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:15:54,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:15:54,472 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:15:54,475 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:15:54,475 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:15:54,476 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:15:54,476 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:15:54,476 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:15:54,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:15:54,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:15:54,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:15:54,477 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:15:54,487 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:15:54,488 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1384057679] [2020-10-27 01:15:54,488 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:15:54,489 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 01:15:54,489 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839789206] [2020-10-27 01:15:54,489 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 01:15:54,490 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:15:54,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 01:15:54,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-10-27 01:15:54,491 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand 10 states. [2020-10-27 01:15:54,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:15:54,834 INFO L93 Difference]: Finished difference Result 63 states and 73 transitions. [2020-10-27 01:15:54,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 01:15:54,835 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 32 [2020-10-27 01:15:54,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:15:54,836 INFO L225 Difference]: With dead ends: 63 [2020-10-27 01:15:54,836 INFO L226 Difference]: Without dead ends: 53 [2020-10-27 01:15:54,837 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2020-10-27 01:15:54,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-10-27 01:15:54,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 47. [2020-10-27 01:15:54,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-27 01:15:54,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 53 transitions. [2020-10-27 01:15:54,845 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 53 transitions. Word has length 32 [2020-10-27 01:15:54,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:15:54,846 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 53 transitions. [2020-10-27 01:15:54,846 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 01:15:54,846 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 53 transitions. [2020-10-27 01:15:54,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-27 01:15:54,847 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:15:54,847 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:15:54,847 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 01:15:54,847 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:15:54,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:15:54,848 INFO L82 PathProgramCache]: Analyzing trace with hash 2061136254, now seen corresponding path program 1 times [2020-10-27 01:15:54,848 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:15:54,849 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [948967522] [2020-10-27 01:15:54,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:15:54,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:15:54,869 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:15:54,892 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:15:55,209 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:15:55,209 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-27 01:15:55,209 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:15:55,209 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 345 [2020-10-27 01:15:55,209 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:15:55,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 01:15:55,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:15:55,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-27 01:15:55,210 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:15:55,405 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:15:55,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:15:55,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:15:55,411 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:15:55,411 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:15:55,411 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:15:55,411 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:15:55,411 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:15:55,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:15:55,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:15:55,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:15:55,412 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:15:55,419 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:15:55,420 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [948967522] [2020-10-27 01:15:55,420 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:15:55,420 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 01:15:55,420 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362264143] [2020-10-27 01:15:55,421 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 01:15:55,421 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:15:55,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 01:15:55,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-10-27 01:15:55,422 INFO L87 Difference]: Start difference. First operand 47 states and 53 transitions. Second operand 10 states. [2020-10-27 01:15:55,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:15:55,760 INFO L93 Difference]: Finished difference Result 63 states and 72 transitions. [2020-10-27 01:15:55,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 01:15:55,761 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 32 [2020-10-27 01:15:55,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:15:55,762 INFO L225 Difference]: With dead ends: 63 [2020-10-27 01:15:55,762 INFO L226 Difference]: Without dead ends: 53 [2020-10-27 01:15:55,763 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2020-10-27 01:15:55,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-10-27 01:15:55,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 49. [2020-10-27 01:15:55,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-27 01:15:55,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 55 transitions. [2020-10-27 01:15:55,769 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 55 transitions. Word has length 32 [2020-10-27 01:15:55,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:15:55,770 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 55 transitions. [2020-10-27 01:15:55,770 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 01:15:55,770 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 55 transitions. [2020-10-27 01:15:55,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-27 01:15:55,771 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:15:55,771 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:15:55,771 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 01:15:55,771 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:15:55,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:15:55,772 INFO L82 PathProgramCache]: Analyzing trace with hash -458823680, now seen corresponding path program 2 times [2020-10-27 01:15:55,772 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:15:55,772 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [941505311] [2020-10-27 01:15:55,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:15:55,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:15:55,791 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:15:55,853 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:15:55,854 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-27 01:15:55,854 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:15:55,854 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 67 [2020-10-27 01:15:55,854 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:15:55,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 01:15:55,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 01:15:55,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-27 01:15:55,855 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:15:55,903 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:15:55,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:15:55,906 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:15:55,910 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:15:55,910 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:15:55,910 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:15:55,911 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:15:55,911 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:15:55,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:15:55,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:15:55,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:15:55,911 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:15:55,915 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-27 01:15:55,915 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [941505311] [2020-10-27 01:15:55,916 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:15:55,916 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-27 01:15:55,916 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81536082] [2020-10-27 01:15:55,916 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 01:15:55,917 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:15:55,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 01:15:55,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-27 01:15:55,917 INFO L87 Difference]: Start difference. First operand 49 states and 55 transitions. Second operand 6 states. [2020-10-27 01:15:56,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:15:56,023 INFO L93 Difference]: Finished difference Result 75 states and 85 transitions. [2020-10-27 01:15:56,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 01:15:56,023 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 32 [2020-10-27 01:15:56,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:15:56,024 INFO L225 Difference]: With dead ends: 75 [2020-10-27 01:15:56,024 INFO L226 Difference]: Without dead ends: 41 [2020-10-27 01:15:56,025 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-10-27 01:15:56,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-10-27 01:15:56,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 38. [2020-10-27 01:15:56,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-27 01:15:56,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 42 transitions. [2020-10-27 01:15:56,030 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 42 transitions. Word has length 32 [2020-10-27 01:15:56,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:15:56,031 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 42 transitions. [2020-10-27 01:15:56,031 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 01:15:56,031 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 42 transitions. [2020-10-27 01:15:56,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-27 01:15:56,032 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:15:56,032 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:15:56,032 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-27 01:15:56,032 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:15:56,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:15:56,033 INFO L82 PathProgramCache]: Analyzing trace with hash 2099318349, now seen corresponding path program 2 times [2020-10-27 01:15:56,033 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:15:56,033 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1824170127] [2020-10-27 01:15:56,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:15:56,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:15:56,058 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:15:56,084 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:15:56,107 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:15:56,269 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:15:56,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:15:56,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:15:59,615 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:15:59,616 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-27 01:15:59,616 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 01:15:59,616 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3566 [2020-10-27 01:15:59,616 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:15:59,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 01:15:59,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:15:59,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-27 01:15:59,617 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:15:59,940 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:15:59,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:15:59,943 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:15:59,947 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:15:59,947 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:15:59,948 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:15:59,948 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:15:59,948 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:15:59,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:15:59,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:15:59,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:15:59,948 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:15:59,962 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:15:59,962 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1824170127] [2020-10-27 01:15:59,962 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:15:59,963 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 01:15:59,963 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945484090] [2020-10-27 01:15:59,963 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 01:15:59,964 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:15:59,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 01:15:59,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2020-10-27 01:15:59,965 INFO L87 Difference]: Start difference. First operand 38 states and 42 transitions. Second operand 12 states. [2020-10-27 01:16:00,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:16:00,426 INFO L93 Difference]: Finished difference Result 68 states and 78 transitions. [2020-10-27 01:16:00,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 01:16:00,428 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 37 [2020-10-27 01:16:00,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:16:00,429 INFO L225 Difference]: With dead ends: 68 [2020-10-27 01:16:00,429 INFO L226 Difference]: Without dead ends: 58 [2020-10-27 01:16:00,431 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2020-10-27 01:16:00,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-10-27 01:16:00,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 52. [2020-10-27 01:16:00,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-27 01:16:00,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 58 transitions. [2020-10-27 01:16:00,441 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 58 transitions. Word has length 37 [2020-10-27 01:16:00,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:16:00,442 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 58 transitions. [2020-10-27 01:16:00,442 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 01:16:00,442 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 58 transitions. [2020-10-27 01:16:00,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-27 01:16:00,443 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:16:00,443 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:16:00,443 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-27 01:16:00,443 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:16:00,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:16:00,444 INFO L82 PathProgramCache]: Analyzing trace with hash -1515590577, now seen corresponding path program 2 times [2020-10-27 01:16:00,444 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:16:00,444 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2062849613] [2020-10-27 01:16:00,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:16:00,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:16:00,468 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:16:00,492 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:16:00,639 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:16:02,222 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:16:02,223 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-27 01:16:02,223 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 01:16:02,223 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1762 [2020-10-27 01:16:02,223 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:16:02,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 01:16:02,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:16:02,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-27 01:16:02,224 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:16:02,521 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:16:02,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:16:02,524 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:16:02,526 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:16:02,526 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:16:02,526 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:16:02,526 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:16:02,527 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:16:02,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:16:02,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:16:02,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:16:02,527 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:16:02,538 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:16:02,539 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2062849613] [2020-10-27 01:16:02,539 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:16:02,539 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 01:16:02,540 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948138085] [2020-10-27 01:16:02,540 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 01:16:02,540 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:16:02,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 01:16:02,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2020-10-27 01:16:02,541 INFO L87 Difference]: Start difference. First operand 52 states and 58 transitions. Second operand 12 states. [2020-10-27 01:16:03,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:16:03,140 INFO L93 Difference]: Finished difference Result 68 states and 77 transitions. [2020-10-27 01:16:03,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-27 01:16:03,140 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 37 [2020-10-27 01:16:03,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:16:03,141 INFO L225 Difference]: With dead ends: 68 [2020-10-27 01:16:03,141 INFO L226 Difference]: Without dead ends: 63 [2020-10-27 01:16:03,142 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2020-10-27 01:16:03,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-10-27 01:16:03,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 54. [2020-10-27 01:16:03,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-27 01:16:03,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 61 transitions. [2020-10-27 01:16:03,157 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 61 transitions. Word has length 37 [2020-10-27 01:16:03,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:16:03,158 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 61 transitions. [2020-10-27 01:16:03,158 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 01:16:03,158 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 61 transitions. [2020-10-27 01:16:03,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-27 01:16:03,162 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:16:03,162 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:16:03,162 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-27 01:16:03,162 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:16:03,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:16:03,163 INFO L82 PathProgramCache]: Analyzing trace with hash 1335012892, now seen corresponding path program 3 times [2020-10-27 01:16:03,163 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:16:03,163 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [338433384] [2020-10-27 01:16:03,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:16:03,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:16:03,190 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:16:03,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:16:03,232 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:16:03,724 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:16:03,853 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:16:04,143 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:16:07,216 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:16:07,217 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-27 01:16:07,217 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 01:16:07,217 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4034 [2020-10-27 01:16:07,217 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:16:07,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 01:16:07,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:16:07,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-27 01:16:07,218 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:16:07,681 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:16:07,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:16:07,684 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:16:07,686 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:16:07,686 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:16:07,686 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:16:07,686 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:16:07,686 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:16:07,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:16:07,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:16:07,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:16:07,687 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:16:07,703 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:16:07,704 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [338433384] [2020-10-27 01:16:07,704 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:16:07,704 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-27 01:16:07,704 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457016441] [2020-10-27 01:16:07,705 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-27 01:16:07,705 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:16:07,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-27 01:16:07,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2020-10-27 01:16:07,706 INFO L87 Difference]: Start difference. First operand 54 states and 61 transitions. Second operand 14 states. [2020-10-27 01:16:08,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:16:08,405 INFO L93 Difference]: Finished difference Result 73 states and 84 transitions. [2020-10-27 01:16:08,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-27 01:16:08,406 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 42 [2020-10-27 01:16:08,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:16:08,407 INFO L225 Difference]: With dead ends: 73 [2020-10-27 01:16:08,407 INFO L226 Difference]: Without dead ends: 68 [2020-10-27 01:16:08,408 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=80, Invalid=382, Unknown=0, NotChecked=0, Total=462 [2020-10-27 01:16:08,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-27 01:16:08,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 57. [2020-10-27 01:16:08,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-27 01:16:08,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 65 transitions. [2020-10-27 01:16:08,415 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 65 transitions. Word has length 42 [2020-10-27 01:16:08,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:16:08,416 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 65 transitions. [2020-10-27 01:16:08,416 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-27 01:16:08,416 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 65 transitions. [2020-10-27 01:16:08,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-27 01:16:08,417 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:16:08,417 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:16:08,417 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-27 01:16:08,417 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:16:08,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:16:08,418 INFO L82 PathProgramCache]: Analyzing trace with hash -156682582, now seen corresponding path program 4 times [2020-10-27 01:16:08,418 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:16:08,418 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1673835440] [2020-10-27 01:16:08,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:16:08,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:16:08,455 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:16:08,472 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:16:08,488 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:16:08,748 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:16:08,796 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:16:10,929 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:16:10,930 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-27 01:16:10,930 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 01:16:10,930 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2483 [2020-10-27 01:16:10,930 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:16:10,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 01:16:10,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:16:10,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-27 01:16:10,931 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:16:11,302 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:16:11,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:16:11,305 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:16:11,307 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:16:11,307 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:16:11,307 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:16:11,307 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:16:11,307 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:16:11,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:16:11,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:16:11,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:16:11,307 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:16:11,318 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 5 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:16:11,318 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1673835440] [2020-10-27 01:16:11,318 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:16:11,318 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 01:16:11,319 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690597765] [2020-10-27 01:16:11,319 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 01:16:11,319 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:16:11,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 01:16:11,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2020-10-27 01:16:11,320 INFO L87 Difference]: Start difference. First operand 57 states and 65 transitions. Second operand 13 states. [2020-10-27 01:16:11,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:16:11,952 INFO L93 Difference]: Finished difference Result 78 states and 91 transitions. [2020-10-27 01:16:11,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-27 01:16:11,953 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 42 [2020-10-27 01:16:11,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:16:11,954 INFO L225 Difference]: With dead ends: 78 [2020-10-27 01:16:11,954 INFO L226 Difference]: Without dead ends: 68 [2020-10-27 01:16:11,956 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2020-10-27 01:16:11,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-27 01:16:11,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 64. [2020-10-27 01:16:11,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-27 01:16:11,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 74 transitions. [2020-10-27 01:16:11,962 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 74 transitions. Word has length 42 [2020-10-27 01:16:11,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:16:11,963 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 74 transitions. [2020-10-27 01:16:11,963 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 01:16:11,963 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 74 transitions. [2020-10-27 01:16:11,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-27 01:16:11,964 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:16:11,964 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:16:11,964 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-27 01:16:11,964 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:16:11,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:16:11,965 INFO L82 PathProgramCache]: Analyzing trace with hash 1618324780, now seen corresponding path program 5 times [2020-10-27 01:16:11,965 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:16:11,965 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [331402183] [2020-10-27 01:16:11,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:16:11,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:16:11,996 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:16:12,010 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:16:12,064 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:16:12,774 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:16:12,774 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-27 01:16:12,774 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 01:16:12,774 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 784 [2020-10-27 01:16:12,774 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:16:12,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 01:16:12,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:16:12,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-27 01:16:12,775 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:16:13,014 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:16:13,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:16:13,018 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:16:13,020 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:16:13,021 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:16:13,021 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:16:13,021 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:16:13,021 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:16:13,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:16:13,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:16:13,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:16:13,022 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:16:13,037 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 12 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-27 01:16:13,038 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [331402183] [2020-10-27 01:16:13,038 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:16:13,038 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 01:16:13,038 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167903144] [2020-10-27 01:16:13,038 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 01:16:13,039 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:16:13,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 01:16:13,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2020-10-27 01:16:13,039 INFO L87 Difference]: Start difference. First operand 64 states and 74 transitions. Second operand 12 states. [2020-10-27 01:16:13,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:16:13,459 INFO L93 Difference]: Finished difference Result 82 states and 95 transitions. [2020-10-27 01:16:13,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 01:16:13,460 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 42 [2020-10-27 01:16:13,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:16:13,461 INFO L225 Difference]: With dead ends: 82 [2020-10-27 01:16:13,461 INFO L226 Difference]: Without dead ends: 67 [2020-10-27 01:16:13,462 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2020-10-27 01:16:13,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-10-27 01:16:13,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 64. [2020-10-27 01:16:13,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-27 01:16:13,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 73 transitions. [2020-10-27 01:16:13,468 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 73 transitions. Word has length 42 [2020-10-27 01:16:13,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:16:13,469 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 73 transitions. [2020-10-27 01:16:13,469 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 01:16:13,469 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 73 transitions. [2020-10-27 01:16:13,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-27 01:16:13,470 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:16:13,470 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:16:13,470 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-27 01:16:13,470 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:16:13,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:16:13,471 INFO L82 PathProgramCache]: Analyzing trace with hash 1876490218, now seen corresponding path program 1 times [2020-10-27 01:16:13,471 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:16:13,471 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [470626872] [2020-10-27 01:16:13,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:16:13,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:16:13,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:16:13,570 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:16:13,571 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-27 01:16:13,571 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:16:13,571 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 86 [2020-10-27 01:16:13,571 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:16:13,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 01:16:13,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 01:16:13,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-27 01:16:13,571 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:16:13,623 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:16:13,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:16:13,625 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:16:13,627 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:16:13,627 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:16:13,627 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:16:13,627 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:16:13,628 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:16:13,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:16:13,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:16:13,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:16:13,628 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:16:13,632 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-10-27 01:16:13,632 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [470626872] [2020-10-27 01:16:13,632 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:16:13,632 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 01:16:13,633 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278915348] [2020-10-27 01:16:13,633 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 01:16:13,633 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:16:13,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 01:16:13,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-27 01:16:13,634 INFO L87 Difference]: Start difference. First operand 64 states and 73 transitions. Second operand 7 states. [2020-10-27 01:16:13,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:16:13,766 INFO L93 Difference]: Finished difference Result 95 states and 110 transitions. [2020-10-27 01:16:13,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 01:16:13,767 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 42 [2020-10-27 01:16:13,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:16:13,768 INFO L225 Difference]: With dead ends: 95 [2020-10-27 01:16:13,768 INFO L226 Difference]: Without dead ends: 51 [2020-10-27 01:16:13,769 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2020-10-27 01:16:13,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-10-27 01:16:13,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 48. [2020-10-27 01:16:13,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-27 01:16:13,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 54 transitions. [2020-10-27 01:16:13,774 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 54 transitions. Word has length 42 [2020-10-27 01:16:13,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:16:13,775 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 54 transitions. [2020-10-27 01:16:13,775 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 01:16:13,775 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 54 transitions. [2020-10-27 01:16:13,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-27 01:16:13,776 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:16:13,776 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:16:13,776 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-27 01:16:13,776 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:16:13,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:16:13,777 INFO L82 PathProgramCache]: Analyzing trace with hash -220033795, now seen corresponding path program 6 times [2020-10-27 01:16:13,777 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:16:13,777 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [266640477] [2020-10-27 01:16:13,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:16:13,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:16:13,799 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:16:13,815 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:16:13,831 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:16:13,867 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:16:14,815 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:16:14,949 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:16:15,090 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:16:15,267 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:16:18,795 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:16:18,795 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-27 01:16:18,795 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-27 01:16:18,795 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-27 01:16:18,795 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:16:18,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 01:16:18,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:16:18,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-27 01:16:18,796 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:16:19,305 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:16:19,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:16:19,308 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:16:19,310 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:16:19,310 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:16:19,311 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:16:19,311 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:16:19,311 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:16:19,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:16:19,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:16:19,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:16:19,311 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:16:19,328 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 12 proven. 28 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-27 01:16:19,328 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [266640477] [2020-10-27 01:16:19,329 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:16:19,329 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-27 01:16:19,329 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197315566] [2020-10-27 01:16:19,329 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-27 01:16:19,329 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:16:19,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-27 01:16:19,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2020-10-27 01:16:19,330 INFO L87 Difference]: Start difference. First operand 48 states and 54 transitions. Second operand 14 states. [2020-10-27 01:16:19,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:16:19,988 INFO L93 Difference]: Finished difference Result 80 states and 92 transitions. [2020-10-27 01:16:19,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 01:16:19,989 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 47 [2020-10-27 01:16:19,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:16:19,990 INFO L225 Difference]: With dead ends: 80 [2020-10-27 01:16:19,990 INFO L226 Difference]: Without dead ends: 68 [2020-10-27 01:16:19,991 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2020-10-27 01:16:19,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-27 01:16:19,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 64. [2020-10-27 01:16:19,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-27 01:16:19,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 73 transitions. [2020-10-27 01:16:19,998 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 73 transitions. Word has length 47 [2020-10-27 01:16:19,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:16:19,998 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 73 transitions. [2020-10-27 01:16:19,998 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-27 01:16:19,998 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 73 transitions. [2020-10-27 01:16:19,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-27 01:16:19,999 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:16:19,999 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:16:19,999 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-27 01:16:19,999 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:16:20,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:16:20,000 INFO L82 PathProgramCache]: Analyzing trace with hash 38131643, now seen corresponding path program 7 times [2020-10-27 01:16:20,000 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:16:20,000 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1582171954] [2020-10-27 01:16:20,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:16:20,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:16:20,044 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:16:20,064 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:16:20,105 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:16:20,524 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:16:20,668 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:16:20,922 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:16:25,024 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:16:25,024 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-27 01:16:25,024 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 01:16:25,024 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-27 01:16:25,024 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:16:25,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-27 01:16:25,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:16:25,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-27 01:16:25,025 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:16:25,654 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:16:25,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:16:25,657 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:16:25,661 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:16:25,661 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:16:25,661 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:16:25,661 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:16:25,661 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:16:25,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:16:25,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:16:25,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:16:25,662 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:16:25,679 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:16:25,680 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1582171954] [2020-10-27 01:16:25,680 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:16:25,680 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-27 01:16:25,680 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394185591] [2020-10-27 01:16:25,680 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-27 01:16:25,681 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:16:25,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-27 01:16:25,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2020-10-27 01:16:25,682 INFO L87 Difference]: Start difference. First operand 64 states and 73 transitions. Second operand 15 states. [2020-10-27 01:16:26,145 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 50 [2020-10-27 01:16:26,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:16:26,697 INFO L93 Difference]: Finished difference Result 83 states and 96 transitions. [2020-10-27 01:16:26,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-27 01:16:26,698 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 47 [2020-10-27 01:16:26,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:16:26,699 INFO L225 Difference]: With dead ends: 83 [2020-10-27 01:16:26,699 INFO L226 Difference]: Without dead ends: 78 [2020-10-27 01:16:26,700 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=91, Invalid=559, Unknown=0, NotChecked=0, Total=650 [2020-10-27 01:16:26,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-10-27 01:16:26,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 62. [2020-10-27 01:16:26,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-27 01:16:26,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 71 transitions. [2020-10-27 01:16:26,707 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 71 transitions. Word has length 47 [2020-10-27 01:16:26,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:16:26,707 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 71 transitions. [2020-10-27 01:16:26,707 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-27 01:16:26,707 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 71 transitions. [2020-10-27 01:16:26,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-27 01:16:26,708 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:16:26,708 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:16:26,708 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-27 01:16:26,708 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:16:26,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:16:26,709 INFO L82 PathProgramCache]: Analyzing trace with hash -1677330932, now seen corresponding path program 8 times [2020-10-27 01:16:26,709 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:16:26,709 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1803234766] [2020-10-27 01:16:26,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:16:26,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:16:26,732 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:16:26,745 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:16:26,756 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:16:27,007 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:16:27,312 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:16:27,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:16:29,035 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:16:31,743 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:16:31,744 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-27 01:16:31,744 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 01:16:31,744 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5018 [2020-10-27 01:16:31,744 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:16:31,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-27 01:16:31,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:16:31,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-27 01:16:31,745 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:16:32,580 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:16:32,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:16:32,583 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:16:32,585 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:16:32,585 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:16:32,585 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:16:32,585 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:16:32,585 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:16:32,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:16:32,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:16:32,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:16:32,586 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:16:32,612 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 12 proven. 44 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-27 01:16:32,612 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1803234766] [2020-10-27 01:16:32,613 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:16:32,613 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-27 01:16:32,613 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626950471] [2020-10-27 01:16:32,616 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-27 01:16:32,616 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:16:32,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-27 01:16:32,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2020-10-27 01:16:32,619 INFO L87 Difference]: Start difference. First operand 62 states and 71 transitions. Second operand 16 states. [2020-10-27 01:16:33,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:16:33,744 INFO L93 Difference]: Finished difference Result 89 states and 104 transitions. [2020-10-27 01:16:33,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-27 01:16:33,745 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 52 [2020-10-27 01:16:33,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:16:33,746 INFO L225 Difference]: With dead ends: 89 [2020-10-27 01:16:33,746 INFO L226 Difference]: Without dead ends: 70 [2020-10-27 01:16:33,747 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=89, Invalid=463, Unknown=0, NotChecked=0, Total=552 [2020-10-27 01:16:33,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-10-27 01:16:33,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 67. [2020-10-27 01:16:33,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-27 01:16:33,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 75 transitions. [2020-10-27 01:16:33,753 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 75 transitions. Word has length 52 [2020-10-27 01:16:33,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:16:33,754 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 75 transitions. [2020-10-27 01:16:33,754 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-27 01:16:33,754 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 75 transitions. [2020-10-27 01:16:33,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-27 01:16:33,754 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:16:33,755 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:16:33,755 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-27 01:16:33,755 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:16:33,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:16:33,755 INFO L82 PathProgramCache]: Analyzing trace with hash 1606519114, now seen corresponding path program 9 times [2020-10-27 01:16:33,755 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:16:33,756 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [405446384] [2020-10-27 01:16:33,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:16:33,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:16:33,776 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:16:33,790 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:16:33,827 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:16:34,413 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:16:34,789 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:16:38,166 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:16:38,772 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:16:38,772 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-27 01:16:38,772 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 01:16:38,772 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-27 01:16:38,772 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:16:38,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-27 01:16:38,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:16:38,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-27 01:16:38,773 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:16:39,152 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 39 [2020-10-27 01:16:39,342 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 56 [2020-10-27 01:16:39,627 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:16:39,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:16:39,631 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:16:39,633 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:16:39,634 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:16:39,634 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:16:39,634 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:16:39,634 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:16:39,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:16:39,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:16:39,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:16:39,634 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:16:39,669 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 5 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:16:39,670 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [405446384] [2020-10-27 01:16:39,670 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:16:39,670 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-27 01:16:39,670 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996924434] [2020-10-27 01:16:39,671 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-27 01:16:39,671 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:16:39,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-27 01:16:39,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2020-10-27 01:16:39,672 INFO L87 Difference]: Start difference. First operand 67 states and 75 transitions. Second operand 17 states. [2020-10-27 01:16:40,170 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 59 [2020-10-27 01:16:40,533 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 79 [2020-10-27 01:16:40,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:16:40,957 INFO L93 Difference]: Finished difference Result 88 states and 101 transitions. [2020-10-27 01:16:40,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-27 01:16:40,958 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 52 [2020-10-27 01:16:40,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:16:40,961 INFO L225 Difference]: With dead ends: 88 [2020-10-27 01:16:40,961 INFO L226 Difference]: Without dead ends: 76 [2020-10-27 01:16:40,962 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=91, Invalid=559, Unknown=0, NotChecked=0, Total=650 [2020-10-27 01:16:40,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-10-27 01:16:40,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 74. [2020-10-27 01:16:40,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-27 01:16:40,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 83 transitions. [2020-10-27 01:16:40,971 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 83 transitions. Word has length 52 [2020-10-27 01:16:40,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:16:40,972 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 83 transitions. [2020-10-27 01:16:40,972 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-27 01:16:40,972 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 83 transitions. [2020-10-27 01:16:40,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-27 01:16:40,972 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:16:40,973 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:16:40,973 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-27 01:16:40,973 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:16:40,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:16:40,973 INFO L82 PathProgramCache]: Analyzing trace with hash -913440820, now seen corresponding path program 10 times [2020-10-27 01:16:40,976 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:16:40,976 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1444082173] [2020-10-27 01:16:40,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:16:40,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:16:41,003 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:16:41,050 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:16:41,434 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:16:42,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:16:43,888 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:16:43,888 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-27 01:16:43,888 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 01:16:43,889 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2894 [2020-10-27 01:16:43,889 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:16:43,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-27 01:16:43,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:16:43,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-27 01:16:43,889 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:16:44,339 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 44 [2020-10-27 01:16:44,669 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:16:44,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:16:44,673 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:16:44,675 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:16:44,675 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:16:44,675 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:16:44,675 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:16:44,675 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:16:44,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:16:44,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:16:44,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:16:44,676 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:16:44,707 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:16:44,707 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1444082173] [2020-10-27 01:16:44,707 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:16:44,708 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-27 01:16:44,708 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363571045] [2020-10-27 01:16:44,709 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-27 01:16:44,710 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:16:44,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-27 01:16:44,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2020-10-27 01:16:44,715 INFO L87 Difference]: Start difference. First operand 74 states and 83 transitions. Second operand 17 states. [2020-10-27 01:16:45,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:16:45,646 INFO L93 Difference]: Finished difference Result 88 states and 99 transitions. [2020-10-27 01:16:45,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-27 01:16:45,646 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 52 [2020-10-27 01:16:45,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:16:45,647 INFO L225 Difference]: With dead ends: 88 [2020-10-27 01:16:45,647 INFO L226 Difference]: Without dead ends: 83 [2020-10-27 01:16:45,649 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=97, Invalid=553, Unknown=0, NotChecked=0, Total=650 [2020-10-27 01:16:45,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-27 01:16:45,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 69. [2020-10-27 01:16:45,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-27 01:16:45,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 77 transitions. [2020-10-27 01:16:45,658 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 77 transitions. Word has length 52 [2020-10-27 01:16:45,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:16:45,658 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 77 transitions. [2020-10-27 01:16:45,658 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-27 01:16:45,658 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 77 transitions. [2020-10-27 01:16:45,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-27 01:16:45,659 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:16:45,659 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:16:45,660 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-27 01:16:45,660 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:16:45,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:16:45,660 INFO L82 PathProgramCache]: Analyzing trace with hash -1463051010, now seen corresponding path program 11 times [2020-10-27 01:16:45,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:16:45,661 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1588117558] [2020-10-27 01:16:45,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:16:45,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:16:45,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:16:45,707 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:16:45,833 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:16:46,012 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:16:47,193 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:16:47,857 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:16:47,857 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-27 01:16:47,857 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 01:16:47,857 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2178 [2020-10-27 01:16:47,857 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:16:47,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-27 01:16:47,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:16:47,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-27 01:16:47,858 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:16:48,418 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:16:48,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:16:48,421 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:16:48,423 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:16:48,423 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:16:48,423 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:16:48,423 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:16:48,423 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:16:48,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:16:48,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:16:48,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:16:48,424 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:16:48,450 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 13 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:16:48,451 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1588117558] [2020-10-27 01:16:48,451 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:16:48,451 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-27 01:16:48,451 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571826810] [2020-10-27 01:16:48,452 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-27 01:16:48,452 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:16:48,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-27 01:16:48,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2020-10-27 01:16:48,453 INFO L87 Difference]: Start difference. First operand 69 states and 77 transitions. Second operand 16 states. [2020-10-27 01:16:49,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:16:49,533 INFO L93 Difference]: Finished difference Result 93 states and 106 transitions. [2020-10-27 01:16:49,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-27 01:16:49,537 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 52 [2020-10-27 01:16:49,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:16:49,539 INFO L225 Difference]: With dead ends: 93 [2020-10-27 01:16:49,539 INFO L226 Difference]: Without dead ends: 83 [2020-10-27 01:16:49,539 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=74, Invalid=478, Unknown=0, NotChecked=0, Total=552 [2020-10-27 01:16:49,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-27 01:16:49,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 77. [2020-10-27 01:16:49,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-27 01:16:49,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 86 transitions. [2020-10-27 01:16:49,554 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 86 transitions. Word has length 52 [2020-10-27 01:16:49,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:16:49,554 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 86 transitions. [2020-10-27 01:16:49,554 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-27 01:16:49,554 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 86 transitions. [2020-10-27 01:16:49,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-27 01:16:49,555 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:16:49,555 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:16:49,555 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-27 01:16:49,555 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:16:49,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:16:49,556 INFO L82 PathProgramCache]: Analyzing trace with hash -782992640, now seen corresponding path program 12 times [2020-10-27 01:16:49,556 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:16:49,556 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [156442431] [2020-10-27 01:16:49,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:16:49,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:16:49,580 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:16:49,611 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:16:50,070 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:16:50,518 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:16:50,519 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-27 01:16:50,519 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 01:16:50,519 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 946 [2020-10-27 01:16:50,519 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:16:50,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-27 01:16:50,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:16:50,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-27 01:16:50,519 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:16:51,278 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:16:51,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:16:51,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:16:51,285 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:16:51,285 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:16:51,285 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:16:51,285 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:16:51,285 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:16:51,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:16:51,286 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:16:51,286 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:16:51,286 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:16:51,311 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 7 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:16:51,312 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [156442431] [2020-10-27 01:16:51,312 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:16:51,312 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-27 01:16:51,312 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444122267] [2020-10-27 01:16:51,313 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-27 01:16:51,313 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:16:51,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-27 01:16:51,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2020-10-27 01:16:51,314 INFO L87 Difference]: Start difference. First operand 77 states and 86 transitions. Second operand 16 states. [2020-10-27 01:16:51,745 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 55 [2020-10-27 01:16:52,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:16:52,308 INFO L93 Difference]: Finished difference Result 93 states and 105 transitions. [2020-10-27 01:16:52,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-27 01:16:52,308 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 52 [2020-10-27 01:16:52,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:16:52,309 INFO L225 Difference]: With dead ends: 93 [2020-10-27 01:16:52,309 INFO L226 Difference]: Without dead ends: 83 [2020-10-27 01:16:52,310 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=90, Invalid=560, Unknown=0, NotChecked=0, Total=650 [2020-10-27 01:16:52,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-27 01:16:52,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 79. [2020-10-27 01:16:52,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-27 01:16:52,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 88 transitions. [2020-10-27 01:16:52,317 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 88 transitions. Word has length 52 [2020-10-27 01:16:52,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:16:52,318 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 88 transitions. [2020-10-27 01:16:52,318 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-27 01:16:52,318 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 88 transitions. [2020-10-27 01:16:52,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-27 01:16:52,318 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:16:52,318 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:16:52,319 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-27 01:16:52,319 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:16:52,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:16:52,319 INFO L82 PathProgramCache]: Analyzing trace with hash 992014722, now seen corresponding path program 2 times [2020-10-27 01:16:52,319 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:16:52,320 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [205947296] [2020-10-27 01:16:52,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:16:52,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:16:52,354 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:16:52,498 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:16:52,499 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-27 01:16:52,499 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:16:52,499 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 152 [2020-10-27 01:16:52,499 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:16:52,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 01:16:52,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 01:16:52,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-27 01:16:52,499 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:16:52,559 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:16:52,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:16:52,563 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:16:52,565 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:16:52,565 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:16:52,565 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:16:52,565 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:16:52,566 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:16:52,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:16:52,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:16:52,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:16:52,566 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:16:52,569 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2020-10-27 01:16:52,570 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [205947296] [2020-10-27 01:16:52,570 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:16:52,570 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-27 01:16:52,570 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237746378] [2020-10-27 01:16:52,570 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 01:16:52,570 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:16:52,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 01:16:52,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-10-27 01:16:52,571 INFO L87 Difference]: Start difference. First operand 79 states and 88 transitions. Second operand 8 states. [2020-10-27 01:16:52,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:16:52,731 INFO L93 Difference]: Finished difference Result 115 states and 130 transitions. [2020-10-27 01:16:52,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 01:16:52,731 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 52 [2020-10-27 01:16:52,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:16:52,732 INFO L225 Difference]: With dead ends: 115 [2020-10-27 01:16:52,732 INFO L226 Difference]: Without dead ends: 61 [2020-10-27 01:16:52,733 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2020-10-27 01:16:52,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-10-27 01:16:52,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 58. [2020-10-27 01:16:52,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-27 01:16:52,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 64 transitions. [2020-10-27 01:16:52,738 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 64 transitions. Word has length 52 [2020-10-27 01:16:52,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:16:52,739 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 64 transitions. [2020-10-27 01:16:52,739 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 01:16:52,739 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 64 transitions. [2020-10-27 01:16:52,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-27 01:16:52,739 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:16:52,740 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:16:52,740 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-27 01:16:52,740 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:16:52,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:16:52,740 INFO L82 PathProgramCache]: Analyzing trace with hash -492385971, now seen corresponding path program 13 times [2020-10-27 01:16:52,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:16:52,741 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [353499531] [2020-10-27 01:16:52,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:16:52,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:16:52,767 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:16:52,788 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:16:52,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:16:53,454 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:16:53,817 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:16:54,172 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:16:57,762 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:16:57,763 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-27 01:16:57,763 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 01:16:57,763 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-27 01:16:57,763 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:16:57,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-27 01:16:57,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:16:57,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-27 01:16:57,763 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:16:58,466 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:16:58,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:16:58,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:16:58,471 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:16:58,471 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:16:58,471 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:16:58,472 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:16:58,472 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:16:58,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:16:58,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:16:58,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:16:58,472 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:16:58,497 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 7 proven. 69 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:16:58,497 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [353499531] [2020-10-27 01:16:58,497 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:16:58,498 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-27 01:16:58,498 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105977899] [2020-10-27 01:16:58,498 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-27 01:16:58,498 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:16:58,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-27 01:16:58,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=268, Unknown=0, NotChecked=0, Total=306 [2020-10-27 01:16:58,499 INFO L87 Difference]: Start difference. First operand 58 states and 64 transitions. Second operand 18 states. [2020-10-27 01:16:59,477 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 73 [2020-10-27 01:17:00,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:17:00,070 INFO L93 Difference]: Finished difference Result 98 states and 112 transitions. [2020-10-27 01:17:00,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-27 01:17:00,071 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 57 [2020-10-27 01:17:00,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:17:00,072 INFO L225 Difference]: With dead ends: 98 [2020-10-27 01:17:00,072 INFO L226 Difference]: Without dead ends: 88 [2020-10-27 01:17:00,073 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=107, Invalid=823, Unknown=0, NotChecked=0, Total=930 [2020-10-27 01:17:00,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-10-27 01:17:00,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 84. [2020-10-27 01:17:00,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-10-27 01:17:00,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 95 transitions. [2020-10-27 01:17:00,081 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 95 transitions. Word has length 57 [2020-10-27 01:17:00,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:17:00,081 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 95 transitions. [2020-10-27 01:17:00,081 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-27 01:17:00,081 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 95 transitions. [2020-10-27 01:17:00,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-27 01:17:00,082 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:17:00,082 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:17:00,082 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-27 01:17:00,082 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:17:00,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:17:00,083 INFO L82 PathProgramCache]: Analyzing trace with hash 1282621391, now seen corresponding path program 14 times [2020-10-27 01:17:00,083 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:17:00,083 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1057448884] [2020-10-27 01:17:00,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:17:00,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:17:00,107 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:17:00,169 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:17:00,448 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:17:00,723 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:17:02,665 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:17:05,099 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:17:05,100 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-27 01:17:05,100 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 01:17:05,100 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-27 01:17:05,100 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:17:05,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-27 01:17:05,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:17:05,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-27 01:17:05,100 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:17:05,528 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 52 [2020-10-27 01:17:06,170 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:17:06,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:17:06,173 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:17:06,175 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:17:06,175 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:17:06,175 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:17:06,175 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:17:06,176 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:17:06,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:17:06,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:17:06,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:17:06,176 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:17:06,203 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:17:06,203 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1057448884] [2020-10-27 01:17:06,203 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:17:06,203 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-27 01:17:06,204 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943835646] [2020-10-27 01:17:06,204 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-27 01:17:06,204 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:17:06,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-27 01:17:06,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=270, Unknown=0, NotChecked=0, Total=306 [2020-10-27 01:17:06,205 INFO L87 Difference]: Start difference. First operand 84 states and 95 transitions. Second operand 18 states. [2020-10-27 01:17:06,805 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 53 [2020-10-27 01:17:07,186 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 66 [2020-10-27 01:17:08,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:17:08,142 INFO L93 Difference]: Finished difference Result 98 states and 111 transitions. [2020-10-27 01:17:08,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-27 01:17:08,142 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 57 [2020-10-27 01:17:08,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:17:08,144 INFO L225 Difference]: With dead ends: 98 [2020-10-27 01:17:08,144 INFO L226 Difference]: Without dead ends: 93 [2020-10-27 01:17:08,145 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=129, Invalid=1061, Unknown=0, NotChecked=0, Total=1190 [2020-10-27 01:17:08,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-27 01:17:08,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 79. [2020-10-27 01:17:08,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-27 01:17:08,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 89 transitions. [2020-10-27 01:17:08,154 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 89 transitions. Word has length 57 [2020-10-27 01:17:08,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:17:08,154 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 89 transitions. [2020-10-27 01:17:08,154 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-27 01:17:08,154 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 89 transitions. [2020-10-27 01:17:08,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-27 01:17:08,155 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:17:08,155 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:17:08,155 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-27 01:17:08,155 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:17:08,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:17:08,156 INFO L82 PathProgramCache]: Analyzing trace with hash 1119972252, now seen corresponding path program 15 times [2020-10-27 01:17:08,156 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:17:08,156 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1452373186] [2020-10-27 01:17:08,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:17:08,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:17:08,186 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:17:08,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:17:08,231 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:17:09,015 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:17:11,442 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:17:13,184 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:17:13,192 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:17:13,192 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-27 01:17:13,193 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 01:17:13,193 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-10-27 01:17:13,193 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:17:13,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-27 01:17:13,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:17:13,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-27 01:17:13,193 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:17:13,748 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 62 [2020-10-27 01:17:14,557 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:17:14,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:17:14,561 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:17:14,565 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:17:14,566 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:17:14,566 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:17:14,566 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:17:14,566 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:17:14,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:17:14,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:17:14,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:17:14,566 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:17:14,606 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 13 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:17:14,606 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1452373186] [2020-10-27 01:17:14,606 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:17:14,606 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-27 01:17:14,606 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960999335] [2020-10-27 01:17:14,607 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-27 01:17:14,607 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:17:14,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-27 01:17:14,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=332, Unknown=0, NotChecked=0, Total=380 [2020-10-27 01:17:14,609 INFO L87 Difference]: Start difference. First operand 79 states and 89 transitions. Second operand 20 states. [2020-10-27 01:17:15,047 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 52 [2020-10-27 01:17:15,294 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 54 [2020-10-27 01:17:15,701 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 74 [2020-10-27 01:17:15,951 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 68 [2020-10-27 01:17:16,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:17:16,786 INFO L93 Difference]: Finished difference Result 129 states and 148 transitions. [2020-10-27 01:17:16,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-27 01:17:16,787 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 62 [2020-10-27 01:17:16,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:17:16,788 INFO L225 Difference]: With dead ends: 129 [2020-10-27 01:17:16,788 INFO L226 Difference]: Without dead ends: 115 [2020-10-27 01:17:16,789 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=115, Invalid=877, Unknown=0, NotChecked=0, Total=992 [2020-10-27 01:17:16,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-10-27 01:17:16,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 106. [2020-10-27 01:17:16,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-10-27 01:17:16,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 120 transitions. [2020-10-27 01:17:16,801 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 120 transitions. Word has length 62 [2020-10-27 01:17:16,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:17:16,802 INFO L481 AbstractCegarLoop]: Abstraction has 106 states and 120 transitions. [2020-10-27 01:17:16,802 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-27 01:17:16,802 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 120 transitions. [2020-10-27 01:17:16,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-27 01:17:16,803 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:17:16,803 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:17:16,803 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-27 01:17:16,803 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:17:16,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:17:16,804 INFO L82 PathProgramCache]: Analyzing trace with hash 1800030622, now seen corresponding path program 16 times [2020-10-27 01:17:16,804 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:17:16,804 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2055783193] [2020-10-27 01:17:16,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:17:16,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:17:16,828 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:17:16,869 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:17:17,167 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:17:18,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:17:19,083 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:17:21,823 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:17:21,823 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-27 01:17:21,823 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 01:17:21,823 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-27 01:17:21,823 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:17:21,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-27 01:17:21,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:17:21,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-27 01:17:21,824 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:17:22,455 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:17:22,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:17:22,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:17:22,460 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:17:22,460 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:17:22,461 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:17:22,461 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:17:22,461 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:17:22,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:17:22,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:17:22,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:17:22,461 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:17:22,492 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 21 proven. 66 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-27 01:17:22,492 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2055783193] [2020-10-27 01:17:22,493 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:17:22,493 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-27 01:17:22,493 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820454224] [2020-10-27 01:17:22,493 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-27 01:17:22,494 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:17:22,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-27 01:17:22,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2020-10-27 01:17:22,495 INFO L87 Difference]: Start difference. First operand 106 states and 120 transitions. Second operand 17 states. [2020-10-27 01:17:23,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:17:23,270 INFO L93 Difference]: Finished difference Result 139 states and 158 transitions. [2020-10-27 01:17:23,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-27 01:17:23,271 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 62 [2020-10-27 01:17:23,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:17:23,272 INFO L225 Difference]: With dead ends: 139 [2020-10-27 01:17:23,273 INFO L226 Difference]: Without dead ends: 106 [2020-10-27 01:17:23,273 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2020-10-27 01:17:23,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-10-27 01:17:23,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2020-10-27 01:17:23,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-10-27 01:17:23,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 117 transitions. [2020-10-27 01:17:23,283 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 117 transitions. Word has length 62 [2020-10-27 01:17:23,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:17:23,283 INFO L481 AbstractCegarLoop]: Abstraction has 106 states and 117 transitions. [2020-10-27 01:17:23,283 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-27 01:17:23,283 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 117 transitions. [2020-10-27 01:17:23,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-27 01:17:23,284 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:17:23,284 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:17:23,284 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-27 01:17:23,284 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:17:23,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:17:23,285 INFO L82 PathProgramCache]: Analyzing trace with hash 211682720, now seen corresponding path program 17 times [2020-10-27 01:17:23,285 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:17:23,285 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1651835833] [2020-10-27 01:17:23,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:17:23,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:17:23,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:17:23,361 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:17:24,162 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:17:24,263 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:17:26,366 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:17:26,366 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-27 01:17:26,366 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 01:17:26,366 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3063 [2020-10-27 01:17:26,366 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:17:26,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-27 01:17:26,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:17:26,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-27 01:17:26,367 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:17:26,853 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 53 [2020-10-27 01:17:27,119 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 56 [2020-10-27 01:17:27,778 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:17:27,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:17:27,782 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:17:27,783 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:17:27,784 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:17:27,784 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:17:27,784 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:17:27,784 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:17:27,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:17:27,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:17:27,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:17:27,784 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:17:27,819 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 0 proven. 99 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:17:27,820 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1651835833] [2020-10-27 01:17:27,820 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:17:27,820 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-27 01:17:27,820 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414655220] [2020-10-27 01:17:27,820 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-27 01:17:27,820 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:17:27,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-27 01:17:27,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=335, Unknown=0, NotChecked=0, Total=380 [2020-10-27 01:17:27,821 INFO L87 Difference]: Start difference. First operand 106 states and 117 transitions. Second operand 20 states. [2020-10-27 01:17:28,654 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 55 [2020-10-27 01:17:28,866 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 71 [2020-10-27 01:17:29,207 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 69 [2020-10-27 01:17:29,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:17:29,856 INFO L93 Difference]: Finished difference Result 124 states and 139 transitions. [2020-10-27 01:17:29,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-27 01:17:29,856 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 62 [2020-10-27 01:17:29,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:17:29,858 INFO L225 Difference]: With dead ends: 124 [2020-10-27 01:17:29,858 INFO L226 Difference]: Without dead ends: 119 [2020-10-27 01:17:29,860 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=136, Invalid=1124, Unknown=0, NotChecked=0, Total=1260 [2020-10-27 01:17:29,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-10-27 01:17:29,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 113. [2020-10-27 01:17:29,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-10-27 01:17:29,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 126 transitions. [2020-10-27 01:17:29,870 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 126 transitions. Word has length 62 [2020-10-27 01:17:29,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:17:29,871 INFO L481 AbstractCegarLoop]: Abstraction has 113 states and 126 transitions. [2020-10-27 01:17:29,871 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-27 01:17:29,871 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 126 transitions. [2020-10-27 01:17:29,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-27 01:17:29,872 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:17:29,872 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:17:29,872 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-27 01:17:29,872 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:17:29,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:17:29,873 INFO L82 PathProgramCache]: Analyzing trace with hash 1928272806, now seen corresponding path program 18 times [2020-10-27 01:17:29,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:17:29,873 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1935873639] [2020-10-27 01:17:29,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:17:29,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:17:29,898 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:17:29,915 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:17:30,022 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:17:30,377 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:17:31,986 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:17:33,098 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:17:33,098 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-27 01:17:33,098 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 01:17:33,099 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3209 [2020-10-27 01:17:33,099 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:17:33,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-27 01:17:33,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:17:33,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-27 01:17:33,099 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:17:33,471 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 46 [2020-10-27 01:17:33,647 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 53 [2020-10-27 01:17:34,234 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:17:34,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:17:34,237 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:17:34,238 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:17:34,238 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:17:34,239 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:17:34,239 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:17:34,239 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:17:34,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:17:34,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:17:34,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:17:34,239 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:17:34,272 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 9 proven. 88 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:17:34,272 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1935873639] [2020-10-27 01:17:34,272 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:17:34,273 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-27 01:17:34,273 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121202593] [2020-10-27 01:17:34,273 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-27 01:17:34,273 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:17:34,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-27 01:17:34,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2020-10-27 01:17:34,274 INFO L87 Difference]: Start difference. First operand 113 states and 126 transitions. Second operand 19 states. [2020-10-27 01:17:35,022 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 70 [2020-10-27 01:17:35,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:17:35,816 INFO L93 Difference]: Finished difference Result 129 states and 146 transitions. [2020-10-27 01:17:35,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-27 01:17:35,816 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 62 [2020-10-27 01:17:35,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:17:35,818 INFO L225 Difference]: With dead ends: 129 [2020-10-27 01:17:35,818 INFO L226 Difference]: Without dead ends: 119 [2020-10-27 01:17:35,819 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=110, Invalid=820, Unknown=0, NotChecked=0, Total=930 [2020-10-27 01:17:35,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-10-27 01:17:35,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 118. [2020-10-27 01:17:35,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-10-27 01:17:35,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 132 transitions. [2020-10-27 01:17:35,828 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 132 transitions. Word has length 62 [2020-10-27 01:17:35,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:17:35,829 INFO L481 AbstractCegarLoop]: Abstraction has 118 states and 132 transitions. [2020-10-27 01:17:35,829 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-27 01:17:35,829 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 132 transitions. [2020-10-27 01:17:35,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-27 01:17:35,829 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:17:35,830 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:17:35,830 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-27 01:17:35,830 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:17:35,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:17:35,830 INFO L82 PathProgramCache]: Analyzing trace with hash -591687128, now seen corresponding path program 3 times [2020-10-27 01:17:35,830 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:17:35,831 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [6241536] [2020-10-27 01:17:35,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:17:35,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:17:35,855 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:17:35,889 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:17:37,051 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:17:37,051 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-27 01:17:37,051 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:17:37,051 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1204 [2020-10-27 01:17:37,052 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:17:37,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-27 01:17:37,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:17:37,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-27 01:17:37,055 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 01:17:37,543 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 43 [2020-10-27 01:17:37,771 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 59 [2020-10-27 01:17:38,000 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 52 [2020-10-27 01:17:38,139 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 44 [2020-10-27 01:17:38,489 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:17:38,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:17:38,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:17:38,493 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:17:38,493 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:17:38,493 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:17:38,493 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:17:38,494 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:17:38,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:17:38,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:17:38,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:17:38,494 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:17:38,540 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 17 proven. 80 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:17:38,540 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [6241536] [2020-10-27 01:17:38,540 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:17:38,541 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-27 01:17:38,541 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675456169] [2020-10-27 01:17:38,541 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-27 01:17:38,541 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:17:38,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-27 01:17:38,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=300, Unknown=0, NotChecked=0, Total=342 [2020-10-27 01:17:38,542 INFO L87 Difference]: Start difference. First operand 118 states and 132 transitions. Second operand 19 states. [2020-10-27 01:17:39,004 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 61 [2020-10-27 01:17:39,175 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 53 [2020-10-27 01:17:39,428 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 72 [2020-10-27 01:17:40,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:17:40,322 INFO L93 Difference]: Finished difference Result 131 states and 147 transitions. [2020-10-27 01:17:40,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-27 01:17:40,323 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 62 [2020-10-27 01:17:40,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:17:40,324 INFO L225 Difference]: With dead ends: 131 [2020-10-27 01:17:40,324 INFO L226 Difference]: Without dead ends: 119 [2020-10-27 01:17:40,325 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=94, Invalid=776, Unknown=0, NotChecked=0, Total=870 [2020-10-27 01:17:40,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-10-27 01:17:40,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 118. [2020-10-27 01:17:40,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-10-27 01:17:40,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 131 transitions. [2020-10-27 01:17:40,336 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 131 transitions. Word has length 62 [2020-10-27 01:17:40,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:17:40,336 INFO L481 AbstractCegarLoop]: Abstraction has 118 states and 131 transitions. [2020-10-27 01:17:40,336 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-27 01:17:40,336 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 131 transitions. [2020-10-27 01:17:40,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-27 01:17:40,337 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:17:40,337 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:17:40,337 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-27 01:17:40,338 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:17:40,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:17:40,338 INFO L82 PathProgramCache]: Analyzing trace with hash 88371242, now seen corresponding path program 4 times [2020-10-27 01:17:40,338 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:17:40,338 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1858660672] [2020-10-27 01:17:40,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:17:40,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:17:40,367 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:17:40,554 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:17:40,554 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-27 01:17:40,554 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:17:40,554 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 197 [2020-10-27 01:17:40,555 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:17:40,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 01:17:40,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 01:17:40,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-27 01:17:40,555 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:17:40,629 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:17:40,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:17:40,632 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:17:40,636 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:17:40,636 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:17:40,636 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:17:40,636 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:17:40,637 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:17:40,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:17:40,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:17:40,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:17:40,637 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:17:40,648 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 4 proven. 38 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2020-10-27 01:17:40,649 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1858660672] [2020-10-27 01:17:40,652 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:17:40,652 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-27 01:17:40,654 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707249673] [2020-10-27 01:17:40,655 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 01:17:40,657 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:17:40,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 01:17:40,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-10-27 01:17:40,658 INFO L87 Difference]: Start difference. First operand 118 states and 131 transitions. Second operand 9 states. [2020-10-27 01:17:40,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:17:40,848 INFO L93 Difference]: Finished difference Result 179 states and 202 transitions. [2020-10-27 01:17:40,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-27 01:17:40,848 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 62 [2020-10-27 01:17:40,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:17:40,849 INFO L225 Difference]: With dead ends: 179 [2020-10-27 01:17:40,849 INFO L226 Difference]: Without dead ends: 92 [2020-10-27 01:17:40,850 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2020-10-27 01:17:40,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-10-27 01:17:40,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2020-10-27 01:17:40,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-27 01:17:40,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 102 transitions. [2020-10-27 01:17:40,860 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 102 transitions. Word has length 62 [2020-10-27 01:17:40,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:17:40,860 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 102 transitions. [2020-10-27 01:17:40,860 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 01:17:40,860 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 102 transitions. [2020-10-27 01:17:40,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-27 01:17:40,861 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:17:40,861 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:17:40,862 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-27 01:17:40,862 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:17:40,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:17:40,862 INFO L82 PathProgramCache]: Analyzing trace with hash -74102791, now seen corresponding path program 19 times [2020-10-27 01:17:40,862 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:17:40,862 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [664134012] [2020-10-27 01:17:40,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:17:40,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:17:40,894 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:17:40,917 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:17:41,110 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:17:41,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:17:44,953 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:17:45,882 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:17:45,882 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-27 01:17:45,882 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 01:17:45,882 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-27 01:17:45,883 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:17:45,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-27 01:17:45,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:17:45,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-27 01:17:45,883 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:17:46,224 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 44 [2020-10-27 01:17:46,500 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 54 [2020-10-27 01:17:46,711 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 68 [2020-10-27 01:17:47,036 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 48 [2020-10-27 01:17:47,424 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:17:47,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:17:47,428 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:17:47,430 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:17:47,430 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:17:47,430 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:17:47,430 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 01:17:47,430 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:17:47,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:17:47,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:17:47,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:17:47,431 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:17:47,476 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 17 proven. 103 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:17:47,477 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [664134012] [2020-10-27 01:17:47,477 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:17:47,477 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-27 01:17:47,477 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429618972] [2020-10-27 01:17:47,477 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-27 01:17:47,478 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:17:47,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-27 01:17:47,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=372, Unknown=0, NotChecked=0, Total=420 [2020-10-27 01:17:47,479 INFO L87 Difference]: Start difference. First operand 92 states and 102 transitions. Second operand 21 states. [2020-10-27 01:17:48,103 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 55 [2020-10-27 01:17:48,291 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2020-10-27 01:17:48,552 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 72 [2020-10-27 01:17:48,758 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 62 [2020-10-27 01:17:49,071 WARN L193 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 85 [2020-10-27 01:17:49,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:17:49,991 INFO L93 Difference]: Finished difference Result 113 states and 128 transitions. [2020-10-27 01:17:49,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-27 01:17:49,992 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 67 [2020-10-27 01:17:49,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:17:49,993 INFO L225 Difference]: With dead ends: 113 [2020-10-27 01:17:49,993 INFO L226 Difference]: Without dead ends: 103 [2020-10-27 01:17:49,995 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=121, Invalid=1069, Unknown=0, NotChecked=0, Total=1190 [2020-10-27 01:17:49,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-10-27 01:17:50,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 97. [2020-10-27 01:17:50,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-10-27 01:17:50,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 108 transitions. [2020-10-27 01:17:50,004 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 108 transitions. Word has length 67 [2020-10-27 01:17:50,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:17:50,004 INFO L481 AbstractCegarLoop]: Abstraction has 97 states and 108 transitions. [2020-10-27 01:17:50,004 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-27 01:17:50,004 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 108 transitions. [2020-10-27 01:17:50,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-27 01:17:50,005 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:17:50,005 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 5, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:17:50,005 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-27 01:17:50,006 INFO L429 AbstractCegarLoop]: === Iteration 34 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:17:50,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:17:50,006 INFO L82 PathProgramCache]: Analyzing trace with hash 605955579, now seen corresponding path program 20 times [2020-10-27 01:17:50,006 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:17:50,006 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1244254554] [2020-10-27 01:17:50,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:17:50,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:17:50,035 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:17:50,075 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:17:50,659 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:17:52,525 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:17:52,728 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:17:55,031 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:17:55,031 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-27 01:17:55,031 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 01:17:55,031 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-27 01:17:55,031 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:17:55,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-27 01:17:55,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:17:55,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-27 01:17:55,032 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:17:55,747 WARN L193 SmtUtils]: Spent 269.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 47 [2020-10-27 01:17:55,956 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 60 [2020-10-27 01:17:56,085 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 53 [2020-10-27 01:17:56,237 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 55 [2020-10-27 01:17:56,402 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 46 [2020-10-27 01:17:56,775 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:17:56,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:17:56,780 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:17:56,781 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:17:56,781 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:17:56,781 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:17:56,781 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 01:17:56,781 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:17:56,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:17:56,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:17:56,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:17:56,782 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:17:56,826 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:17:56,826 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1244254554] [2020-10-27 01:17:56,826 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:17:56,826 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-27 01:17:56,827 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80135827] [2020-10-27 01:17:56,827 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-27 01:17:56,827 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:17:56,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-27 01:17:56,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=368, Unknown=0, NotChecked=0, Total=420 [2020-10-27 01:17:56,828 INFO L87 Difference]: Start difference. First operand 97 states and 108 transitions. Second operand 21 states. [2020-10-27 01:17:57,429 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 73 [2020-10-27 01:17:58,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:17:58,415 INFO L93 Difference]: Finished difference Result 113 states and 127 transitions. [2020-10-27 01:17:58,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-27 01:17:58,416 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 67 [2020-10-27 01:17:58,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:17:58,417 INFO L225 Difference]: With dead ends: 113 [2020-10-27 01:17:58,417 INFO L226 Difference]: Without dead ends: 108 [2020-10-27 01:17:58,418 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=124, Invalid=998, Unknown=0, NotChecked=0, Total=1122 [2020-10-27 01:17:58,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-10-27 01:17:58,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 97. [2020-10-27 01:17:58,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-10-27 01:17:58,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 108 transitions. [2020-10-27 01:17:58,428 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 108 transitions. Word has length 67 [2020-10-27 01:17:58,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:17:58,428 INFO L481 AbstractCegarLoop]: Abstraction has 97 states and 108 transitions. [2020-10-27 01:17:58,428 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-27 01:17:58,428 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 108 transitions. [2020-10-27 01:17:58,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-27 01:17:58,429 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:17:58,429 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 5, 5, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:17:58,429 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-27 01:17:58,429 INFO L429 AbstractCegarLoop]: === Iteration 35 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:17:58,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:17:58,430 INFO L82 PathProgramCache]: Analyzing trace with hash 1797587018, now seen corresponding path program 21 times [2020-10-27 01:17:58,430 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:17:58,430 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2041945861] [2020-10-27 01:17:58,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:17:58,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:17:58,457 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:17:58,474 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:17:58,663 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:17:58,899 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:17:59,327 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:18:00,117 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:18:02,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:18:03,455 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:18:03,456 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-27 01:18:03,456 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 01:18:03,456 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-27 01:18:03,456 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:18:03,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-27 01:18:03,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:18:03,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 61 [2020-10-27 01:18:03,457 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:18:03,914 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 44 [2020-10-27 01:18:04,121 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 54 [2020-10-27 01:18:04,375 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 63 [2020-10-27 01:18:04,694 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 69 [2020-10-27 01:18:04,953 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 63 [2020-10-27 01:18:05,205 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 62 [2020-10-27 01:18:05,681 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:18:05,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:18:05,685 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:18:05,686 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:18:05,686 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:18:05,686 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:18:05,686 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 01:18:05,686 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:18:05,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:18:05,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:18:05,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:18:05,687 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:18:05,742 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 9 proven. 139 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:18:05,743 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2041945861] [2020-10-27 01:18:05,743 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:18:05,743 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-27 01:18:05,743 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060193656] [2020-10-27 01:18:05,743 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-27 01:18:05,743 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:18:05,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-27 01:18:05,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=445, Unknown=0, NotChecked=0, Total=506 [2020-10-27 01:18:05,744 INFO L87 Difference]: Start difference. First operand 97 states and 108 transitions. Second operand 23 states. [2020-10-27 01:18:06,911 WARN L193 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 74 [2020-10-27 01:18:07,236 WARN L193 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 79 [2020-10-27 01:18:08,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:18:08,057 INFO L93 Difference]: Finished difference Result 117 states and 133 transitions. [2020-10-27 01:18:08,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-27 01:18:08,058 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 72 [2020-10-27 01:18:08,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:18:08,059 INFO L225 Difference]: With dead ends: 117 [2020-10-27 01:18:08,059 INFO L226 Difference]: Without dead ends: 105 [2020-10-27 01:18:08,060 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=129, Invalid=1061, Unknown=0, NotChecked=0, Total=1190 [2020-10-27 01:18:08,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-10-27 01:18:08,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 104. [2020-10-27 01:18:08,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-10-27 01:18:08,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 116 transitions. [2020-10-27 01:18:08,069 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 116 transitions. Word has length 72 [2020-10-27 01:18:08,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:18:08,069 INFO L481 AbstractCegarLoop]: Abstraction has 104 states and 116 transitions. [2020-10-27 01:18:08,069 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-27 01:18:08,069 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 116 transitions. [2020-10-27 01:18:08,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-27 01:18:08,070 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:18:08,070 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 5, 5, 5, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:18:08,070 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-27 01:18:08,070 INFO L429 AbstractCegarLoop]: === Iteration 36 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:18:08,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:18:08,071 INFO L82 PathProgramCache]: Analyzing trace with hash -722372916, now seen corresponding path program 22 times [2020-10-27 01:18:08,071 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:18:08,071 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [899737743] [2020-10-27 01:18:08,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:18:08,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:18:08,100 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:18:08,117 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:18:08,287 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:18:08,928 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:18:11,770 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:18:12,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:18:13,112 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:18:13,247 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:18:13,247 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-27 01:18:13,247 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 01:18:13,247 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5156 [2020-10-27 01:18:13,248 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:18:13,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-27 01:18:13,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:18:13,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-27 01:18:13,248 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:18:13,757 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 54 [2020-10-27 01:18:13,892 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 50 [2020-10-27 01:18:14,069 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 59 [2020-10-27 01:18:14,480 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:18:14,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:18:14,483 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:18:14,484 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:18:14,484 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:18:14,484 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:18:14,484 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:18:14,485 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:18:14,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:18:14,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:18:14,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:18:14,485 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:18:14,535 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 26 proven. 117 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-27 01:18:14,535 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [899737743] [2020-10-27 01:18:14,535 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:18:14,535 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-27 01:18:14,536 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003266187] [2020-10-27 01:18:14,536 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-27 01:18:14,536 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:18:14,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-27 01:18:14,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2020-10-27 01:18:14,537 INFO L87 Difference]: Start difference. First operand 104 states and 116 transitions. Second operand 21 states. [2020-10-27 01:18:15,298 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 64 [2020-10-27 01:18:15,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:18:15,973 INFO L93 Difference]: Finished difference Result 126 states and 141 transitions. [2020-10-27 01:18:15,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-27 01:18:15,974 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 72 [2020-10-27 01:18:15,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:18:15,975 INFO L225 Difference]: With dead ends: 126 [2020-10-27 01:18:15,975 INFO L226 Difference]: Without dead ends: 104 [2020-10-27 01:18:15,976 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=114, Invalid=816, Unknown=0, NotChecked=0, Total=930 [2020-10-27 01:18:15,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-10-27 01:18:15,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 104. [2020-10-27 01:18:15,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-10-27 01:18:15,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 114 transitions. [2020-10-27 01:18:15,986 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 114 transitions. Word has length 72 [2020-10-27 01:18:15,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:18:15,986 INFO L481 AbstractCegarLoop]: Abstraction has 104 states and 114 transitions. [2020-10-27 01:18:15,986 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-27 01:18:15,986 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 114 transitions. [2020-10-27 01:18:15,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-27 01:18:15,987 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:18:15,987 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 5, 5, 5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:18:15,987 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-27 01:18:15,987 INFO L429 AbstractCegarLoop]: === Iteration 37 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:18:15,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:18:15,988 INFO L82 PathProgramCache]: Analyzing trace with hash -464207478, now seen corresponding path program 5 times [2020-10-27 01:18:15,988 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:18:15,988 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1911987096] [2020-10-27 01:18:15,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:18:16,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:18:16,015 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:18:16,084 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:18:16,651 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:18:18,591 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:18:21,030 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:18:21,030 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-27 01:18:21,030 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 01:18:21,030 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5025 [2020-10-27 01:18:21,030 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:18:21,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-27 01:18:21,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:18:21,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 59 [2020-10-27 01:18:21,031 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:18:21,398 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 46 [2020-10-27 01:18:21,518 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 43 [2020-10-27 01:18:21,712 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 58 [2020-10-27 01:18:21,839 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 51 [2020-10-27 01:18:22,013 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 67 [2020-10-27 01:18:22,299 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 69 [2020-10-27 01:18:23,108 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:18:23,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:18:23,111 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:18:23,112 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:18:23,113 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:18:23,113 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:18:23,113 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 01:18:23,113 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:18:23,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:18:23,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:18:23,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:18:23,113 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:18:23,170 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 17 proven. 131 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:18:23,171 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1911987096] [2020-10-27 01:18:23,171 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:18:23,171 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-27 01:18:23,171 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290028858] [2020-10-27 01:18:23,171 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-27 01:18:23,172 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:18:23,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-27 01:18:23,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=456, Unknown=0, NotChecked=0, Total=506 [2020-10-27 01:18:23,172 INFO L87 Difference]: Start difference. First operand 104 states and 114 transitions. Second operand 23 states. [2020-10-27 01:18:23,914 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 55 [2020-10-27 01:18:24,308 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 64 [2020-10-27 01:18:24,511 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 60 [2020-10-27 01:18:24,804 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 78 [2020-10-27 01:18:24,993 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 61 [2020-10-27 01:18:25,326 WARN L193 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 90 [2020-10-27 01:18:25,736 WARN L193 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 83 [2020-10-27 01:18:26,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:18:26,519 INFO L93 Difference]: Finished difference Result 120 states and 132 transitions. [2020-10-27 01:18:26,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-27 01:18:26,520 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 72 [2020-10-27 01:18:26,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:18:26,521 INFO L225 Difference]: With dead ends: 120 [2020-10-27 01:18:26,521 INFO L226 Difference]: Without dead ends: 108 [2020-10-27 01:18:26,523 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 255 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=140, Invalid=1420, Unknown=0, NotChecked=0, Total=1560 [2020-10-27 01:18:26,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-10-27 01:18:26,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 104. [2020-10-27 01:18:26,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-10-27 01:18:26,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 113 transitions. [2020-10-27 01:18:26,533 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 113 transitions. Word has length 72 [2020-10-27 01:18:26,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:18:26,534 INFO L481 AbstractCegarLoop]: Abstraction has 104 states and 113 transitions. [2020-10-27 01:18:26,534 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-27 01:18:26,534 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 113 transitions. [2020-10-27 01:18:26,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-27 01:18:26,535 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:18:26,535 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 5, 5, 5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:18:26,535 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-27 01:18:26,535 INFO L429 AbstractCegarLoop]: === Iteration 38 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:18:26,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:18:26,536 INFO L82 PathProgramCache]: Analyzing trace with hash 215850892, now seen corresponding path program 6 times [2020-10-27 01:18:26,536 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:18:26,536 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1165220762] [2020-10-27 01:18:26,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:18:26,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:18:26,570 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:18:26,647 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:18:27,837 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:18:29,207 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:18:29,207 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-27 01:18:29,207 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 01:18:29,207 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2649 [2020-10-27 01:18:29,207 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:18:29,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-27 01:18:29,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:18:29,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 63 [2020-10-27 01:18:29,208 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:18:29,961 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 62 [2020-10-27 01:18:30,224 WARN L193 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 80 [2020-10-27 01:18:30,658 WARN L193 SmtUtils]: Spent 368.00 ms on a formula simplification. DAG size of input: 129 DAG size of output: 95 [2020-10-27 01:18:30,952 WARN L193 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 147 DAG size of output: 94 [2020-10-27 01:18:31,270 WARN L193 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 77 [2020-10-27 01:18:31,719 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:18:31,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:18:31,722 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:18:31,723 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:18:31,724 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:18:31,724 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:18:31,724 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:18:31,724 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:18:31,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:18:31,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:18:31,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:18:31,724 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:18:31,785 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 0 proven. 148 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:18:31,785 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1165220762] [2020-10-27 01:18:31,785 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:18:31,786 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-27 01:18:31,786 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336775807] [2020-10-27 01:18:31,786 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-27 01:18:31,786 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:18:31,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-27 01:18:31,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=452, Unknown=0, NotChecked=0, Total=506 [2020-10-27 01:18:31,787 INFO L87 Difference]: Start difference. First operand 104 states and 113 transitions. Second operand 23 states. [2020-10-27 01:18:32,398 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 62 [2020-10-27 01:18:32,651 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 80 [2020-10-27 01:18:33,192 WARN L193 SmtUtils]: Spent 414.00 ms on a formula simplification. DAG size of input: 159 DAG size of output: 123 [2020-10-27 01:18:34,021 WARN L193 SmtUtils]: Spent 667.00 ms on a formula simplification. DAG size of input: 162 DAG size of output: 139 [2020-10-27 01:18:35,023 WARN L193 SmtUtils]: Spent 628.00 ms on a formula simplification. DAG size of input: 160 DAG size of output: 137 [2020-10-27 01:18:35,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:18:35,809 INFO L93 Difference]: Finished difference Result 118 states and 129 transitions. [2020-10-27 01:18:35,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-27 01:18:35,810 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 72 [2020-10-27 01:18:35,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:18:35,811 INFO L225 Difference]: With dead ends: 118 [2020-10-27 01:18:35,812 INFO L226 Difference]: Without dead ends: 113 [2020-10-27 01:18:35,812 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=117, Invalid=1073, Unknown=0, NotChecked=0, Total=1190 [2020-10-27 01:18:35,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-10-27 01:18:35,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 97. [2020-10-27 01:18:35,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-10-27 01:18:35,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 106 transitions. [2020-10-27 01:18:35,821 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 106 transitions. Word has length 72 [2020-10-27 01:18:35,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:18:35,822 INFO L481 AbstractCegarLoop]: Abstraction has 97 states and 106 transitions. [2020-10-27 01:18:35,822 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-27 01:18:35,822 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 106 transitions. [2020-10-27 01:18:35,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-27 01:18:35,822 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:18:35,822 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:18:35,822 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-27 01:18:35,823 INFO L429 AbstractCegarLoop]: === Iteration 39 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:18:35,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:18:35,823 INFO L82 PathProgramCache]: Analyzing trace with hash 2066296638, now seen corresponding path program 23 times [2020-10-27 01:18:35,823 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:18:35,823 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1268089888] [2020-10-27 01:18:35,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:18:35,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:18:35,852 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:18:35,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:18:35,989 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:18:36,424 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:18:38,897 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:18:40,564 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:18:40,565 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-27 01:18:40,565 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 01:18:40,565 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4722 [2020-10-27 01:18:40,565 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:18:40,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-27 01:18:40,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:18:40,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 59 [2020-10-27 01:18:40,565 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:18:40,931 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 42 [2020-10-27 01:18:41,116 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 55 [2020-10-27 01:18:41,346 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 64 [2020-10-27 01:18:42,261 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:18:42,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:18:42,264 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:18:42,265 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:18:42,265 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:18:42,265 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:18:42,265 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 01:18:42,265 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:18:42,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:18:42,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:18:42,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:18:42,266 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:18:42,318 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 21 proven. 125 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:18:42,318 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1268089888] [2020-10-27 01:18:42,318 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:18:42,318 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-27 01:18:42,319 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392122579] [2020-10-27 01:18:42,319 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-27 01:18:42,319 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:18:42,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-27 01:18:42,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=413, Unknown=0, NotChecked=0, Total=462 [2020-10-27 01:18:42,320 INFO L87 Difference]: Start difference. First operand 97 states and 106 transitions. Second operand 22 states. [2020-10-27 01:18:42,845 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 53 [2020-10-27 01:18:43,264 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 70 [2020-10-27 01:18:43,458 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 58 [2020-10-27 01:18:43,764 WARN L193 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 82 [2020-10-27 01:18:44,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:18:44,925 INFO L93 Difference]: Finished difference Result 123 states and 136 transitions. [2020-10-27 01:18:44,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-27 01:18:44,926 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 72 [2020-10-27 01:18:44,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:18:44,928 INFO L225 Difference]: With dead ends: 123 [2020-10-27 01:18:44,928 INFO L226 Difference]: Without dead ends: 113 [2020-10-27 01:18:44,929 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=126, Invalid=1206, Unknown=0, NotChecked=0, Total=1332 [2020-10-27 01:18:44,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-10-27 01:18:44,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 107. [2020-10-27 01:18:44,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-10-27 01:18:44,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 116 transitions. [2020-10-27 01:18:44,940 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 116 transitions. Word has length 72 [2020-10-27 01:18:44,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:18:44,940 INFO L481 AbstractCegarLoop]: Abstraction has 107 states and 116 transitions. [2020-10-27 01:18:44,940 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-27 01:18:44,940 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 116 transitions. [2020-10-27 01:18:44,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-27 01:18:44,941 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:18:44,941 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:18:44,941 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-27 01:18:44,942 INFO L429 AbstractCegarLoop]: === Iteration 40 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:18:44,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:18:44,942 INFO L82 PathProgramCache]: Analyzing trace with hash -1548612288, now seen corresponding path program 24 times [2020-10-27 01:18:44,942 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:18:44,942 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [221782291] [2020-10-27 01:18:44,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:18:44,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:18:44,972 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:18:45,041 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:18:45,956 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:18:47,090 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:18:47,091 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-27 01:18:47,091 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 01:18:47,091 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2129 [2020-10-27 01:18:47,091 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:18:47,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-27 01:18:47,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:18:47,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 61 [2020-10-27 01:18:47,091 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:18:47,539 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 52 [2020-10-27 01:18:47,714 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 57 [2020-10-27 01:18:48,300 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:18:48,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:18:48,303 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:18:48,305 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:18:48,305 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:18:48,305 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:18:48,305 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:18:48,305 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:18:48,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:18:48,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:18:48,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:18:48,305 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:18:48,353 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 11 proven. 135 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:18:48,354 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [221782291] [2020-10-27 01:18:48,354 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:18:48,354 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-27 01:18:48,354 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511952894] [2020-10-27 01:18:48,354 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-27 01:18:48,354 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:18:48,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-27 01:18:48,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=412, Unknown=0, NotChecked=0, Total=462 [2020-10-27 01:18:48,355 INFO L87 Difference]: Start difference. First operand 107 states and 116 transitions. Second operand 22 states. [2020-10-27 01:18:49,260 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 78 [2020-10-27 01:18:49,694 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 87 [2020-10-27 01:18:50,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:18:50,780 INFO L93 Difference]: Finished difference Result 123 states and 135 transitions. [2020-10-27 01:18:50,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-27 01:18:50,781 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 72 [2020-10-27 01:18:50,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:18:50,782 INFO L225 Difference]: With dead ends: 123 [2020-10-27 01:18:50,782 INFO L226 Difference]: Without dead ends: 113 [2020-10-27 01:18:50,783 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=136, Invalid=1270, Unknown=0, NotChecked=0, Total=1406 [2020-10-27 01:18:50,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-10-27 01:18:50,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 109. [2020-10-27 01:18:50,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-10-27 01:18:50,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 118 transitions. [2020-10-27 01:18:50,794 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 118 transitions. Word has length 72 [2020-10-27 01:18:50,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:18:50,794 INFO L481 AbstractCegarLoop]: Abstraction has 109 states and 118 transitions. [2020-10-27 01:18:50,794 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-27 01:18:50,794 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 118 transitions. [2020-10-27 01:18:50,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-27 01:18:50,795 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:18:50,795 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:18:50,796 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-27 01:18:50,796 INFO L429 AbstractCegarLoop]: === Iteration 41 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:18:50,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:18:50,796 INFO L82 PathProgramCache]: Analyzing trace with hash 226395074, now seen corresponding path program 7 times [2020-10-27 01:18:50,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:18:50,797 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1552307553] [2020-10-27 01:18:50,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:18:50,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:18:50,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:18:51,119 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:18:51,120 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-27 01:18:51,120 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:18:51,120 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 301 [2020-10-27 01:18:51,120 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:18:51,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 01:18:51,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 01:18:51,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-27 01:18:51,120 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:18:51,219 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:18:51,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:18:51,223 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:18:51,224 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:18:51,225 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:18:51,225 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:18:51,225 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:18:51,225 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:18:51,225 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:18:51,225 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:18:51,225 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:18:51,225 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:18:51,230 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 5 proven. 60 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2020-10-27 01:18:51,230 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1552307553] [2020-10-27 01:18:51,231 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:18:51,231 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 01:18:51,231 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464313737] [2020-10-27 01:18:51,231 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 01:18:51,231 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:18:51,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 01:18:51,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2020-10-27 01:18:51,232 INFO L87 Difference]: Start difference. First operand 109 states and 118 transitions. Second operand 10 states. [2020-10-27 01:18:51,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:18:51,455 INFO L93 Difference]: Finished difference Result 155 states and 170 transitions. [2020-10-27 01:18:51,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-27 01:18:51,455 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 72 [2020-10-27 01:18:51,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:18:51,456 INFO L225 Difference]: With dead ends: 155 [2020-10-27 01:18:51,456 INFO L226 Difference]: Without dead ends: 81 [2020-10-27 01:18:51,457 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2020-10-27 01:18:51,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-10-27 01:18:51,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 78. [2020-10-27 01:18:51,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-27 01:18:51,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 84 transitions. [2020-10-27 01:18:51,467 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 84 transitions. Word has length 72 [2020-10-27 01:18:51,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:18:51,467 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 84 transitions. [2020-10-27 01:18:51,468 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 01:18:51,468 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 84 transitions. [2020-10-27 01:18:51,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-10-27 01:18:51,468 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:18:51,469 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 6, 6, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:18:51,469 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-27 01:18:51,469 INFO L429 AbstractCegarLoop]: === Iteration 42 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:18:51,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:18:51,469 INFO L82 PathProgramCache]: Analyzing trace with hash -219872883, now seen corresponding path program 25 times [2020-10-27 01:18:51,469 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:18:51,469 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [182541517] [2020-10-27 01:18:51,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:18:51,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:18:51,503 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:18:51,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:18:51,581 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:18:52,878 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:18:55,788 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:18:56,526 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:18:56,526 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-10-27 01:18:56,526 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 01:18:56,526 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5035 [2020-10-27 01:18:56,526 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:18:56,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-27 01:18:56,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:18:56,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-27 01:18:56,526 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:18:56,952 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 43 [2020-10-27 01:18:57,154 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-10-27 01:18:57,431 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 67 [2020-10-27 01:18:57,892 WARN L193 SmtUtils]: Spent 297.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 92 [2020-10-27 01:18:58,051 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 93 [2020-10-27 01:18:58,241 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2020-10-27 01:18:58,815 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:18:58,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:18:58,818 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:18:58,820 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:18:58,820 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:18:58,820 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:18:58,820 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:18:58,820 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:18:58,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:18:58,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:18:58,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:18:58,820 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:18:58,892 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 11 proven. 163 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:18:58,892 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [182541517] [2020-10-27 01:18:58,892 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:18:58,892 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-27 01:18:58,893 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375798805] [2020-10-27 01:18:58,893 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-27 01:18:58,893 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:18:58,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-27 01:18:58,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=499, Unknown=0, NotChecked=0, Total=552 [2020-10-27 01:18:58,894 INFO L87 Difference]: Start difference. First operand 78 states and 84 transitions. Second operand 24 states. [2020-10-27 01:18:59,683 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 60 [2020-10-27 01:18:59,889 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-10-27 01:19:00,254 WARN L193 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 88 [2020-10-27 01:19:00,567 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 73 [2020-10-27 01:19:01,019 WARN L193 SmtUtils]: Spent 315.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 98 [2020-10-27 01:19:01,374 WARN L193 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 94 [2020-10-27 01:19:02,211 WARN L193 SmtUtils]: Spent 676.00 ms on a formula simplification. DAG size of input: 166 DAG size of output: 149 [2020-10-27 01:19:03,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:19:03,422 INFO L93 Difference]: Finished difference Result 128 states and 142 transitions. [2020-10-27 01:19:03,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-27 01:19:03,423 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 77 [2020-10-27 01:19:03,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:19:03,425 INFO L225 Difference]: With dead ends: 128 [2020-10-27 01:19:03,425 INFO L226 Difference]: Without dead ends: 118 [2020-10-27 01:19:03,426 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=149, Invalid=1573, Unknown=0, NotChecked=0, Total=1722 [2020-10-27 01:19:03,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-10-27 01:19:03,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 114. [2020-10-27 01:19:03,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-10-27 01:19:03,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 125 transitions. [2020-10-27 01:19:03,439 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 125 transitions. Word has length 77 [2020-10-27 01:19:03,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:19:03,439 INFO L481 AbstractCegarLoop]: Abstraction has 114 states and 125 transitions. [2020-10-27 01:19:03,440 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-27 01:19:03,440 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 125 transitions. [2020-10-27 01:19:03,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-10-27 01:19:03,440 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:19:03,441 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 6, 6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:19:03,441 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-27 01:19:03,441 INFO L429 AbstractCegarLoop]: === Iteration 43 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:19:03,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:19:03,441 INFO L82 PathProgramCache]: Analyzing trace with hash 1555134479, now seen corresponding path program 8 times [2020-10-27 01:19:03,441 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:19:03,442 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [685290506] [2020-10-27 01:19:03,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:19:03,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:19:03,475 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:19:03,558 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:19:04,168 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:19:07,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:19:08,529 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:19:08,529 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-10-27 01:19:08,529 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 01:19:08,529 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5066 [2020-10-27 01:19:08,529 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:19:08,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-27 01:19:08,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:19:08,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-27 01:19:08,530 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:19:08,865 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 43 [2020-10-27 01:19:09,120 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 56 [2020-10-27 01:19:09,347 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 61 [2020-10-27 01:19:10,027 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:19:10,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:19:10,030 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:19:10,036 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:19:10,036 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:19:10,036 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:19:10,036 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 01:19:10,036 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:19:10,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:19:10,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:19:10,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:19:10,037 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:19:10,090 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 47 proven. 111 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-10-27 01:19:10,090 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [685290506] [2020-10-27 01:19:10,090 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:19:10,090 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-27 01:19:10,091 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054800827] [2020-10-27 01:19:10,091 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-27 01:19:10,091 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:19:10,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-27 01:19:10,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=372, Unknown=0, NotChecked=0, Total=420 [2020-10-27 01:19:10,092 INFO L87 Difference]: Start difference. First operand 114 states and 125 transitions. Second operand 21 states. [2020-10-27 01:19:10,823 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 58 [2020-10-27 01:19:11,009 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 51 [2020-10-27 01:19:11,273 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 66 [2020-10-27 01:19:11,508 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 66 [2020-10-27 01:19:12,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:19:12,252 INFO L93 Difference]: Finished difference Result 145 states and 159 transitions. [2020-10-27 01:19:12,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-27 01:19:12,253 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 77 [2020-10-27 01:19:12,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:19:12,254 INFO L225 Difference]: With dead ends: 145 [2020-10-27 01:19:12,255 INFO L226 Difference]: Without dead ends: 114 [2020-10-27 01:19:12,256 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=109, Invalid=947, Unknown=0, NotChecked=0, Total=1056 [2020-10-27 01:19:12,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-10-27 01:19:12,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 114. [2020-10-27 01:19:12,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-10-27 01:19:12,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 123 transitions. [2020-10-27 01:19:12,268 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 123 transitions. Word has length 77 [2020-10-27 01:19:12,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:19:12,269 INFO L481 AbstractCegarLoop]: Abstraction has 114 states and 123 transitions. [2020-10-27 01:19:12,269 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-27 01:19:12,269 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 123 transitions. [2020-10-27 01:19:12,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-10-27 01:19:12,270 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:19:12,270 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 6, 6, 6, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:19:12,270 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-27 01:19:12,270 INFO L429 AbstractCegarLoop]: === Iteration 44 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:19:12,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:19:12,271 INFO L82 PathProgramCache]: Analyzing trace with hash -133809263, now seen corresponding path program 9 times [2020-10-27 01:19:12,271 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:19:12,271 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1428543819] [2020-10-27 01:19:12,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:19:12,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:19:12,301 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:19:12,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:19:13,883 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:19:15,241 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:19:15,241 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-10-27 01:19:15,241 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 01:19:15,241 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2949 [2020-10-27 01:19:15,241 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:19:15,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-27 01:19:15,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:19:15,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-27 01:19:15,241 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:19:15,657 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 47 [2020-10-27 01:19:15,926 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 57 [2020-10-27 01:19:16,061 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 50 [2020-10-27 01:19:16,277 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 66 [2020-10-27 01:19:16,444 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 59 [2020-10-27 01:19:16,721 WARN L193 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 74 [2020-10-27 01:19:16,927 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 70 [2020-10-27 01:19:17,132 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 62 [2020-10-27 01:19:17,893 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:19:17,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:19:17,899 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:19:17,900 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:19:17,900 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:19:17,900 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:19:17,901 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 01:19:17,901 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:19:17,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:19:17,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:19:17,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:19:17,901 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:19:17,971 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 21 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:19:17,971 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1428543819] [2020-10-27 01:19:17,972 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:19:17,972 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-27 01:19:17,972 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806601201] [2020-10-27 01:19:17,972 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-27 01:19:17,972 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:19:17,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-27 01:19:17,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=503, Unknown=0, NotChecked=0, Total=552 [2020-10-27 01:19:17,973 INFO L87 Difference]: Start difference. First operand 114 states and 123 transitions. Second operand 24 states. [2020-10-27 01:19:18,566 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 51 [2020-10-27 01:19:19,044 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 61 [2020-10-27 01:19:19,277 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 51 [2020-10-27 01:19:19,608 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 76 [2020-10-27 01:19:19,875 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 60 [2020-10-27 01:19:20,285 WARN L193 SmtUtils]: Spent 278.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 87 [2020-10-27 01:19:20,598 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 72 [2020-10-27 01:19:20,982 WARN L193 SmtUtils]: Spent 269.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 92 [2020-10-27 01:19:22,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:19:22,447 INFO L93 Difference]: Finished difference Result 130 states and 141 transitions. [2020-10-27 01:19:22,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-27 01:19:22,448 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 77 [2020-10-27 01:19:22,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:19:22,449 INFO L225 Difference]: With dead ends: 130 [2020-10-27 01:19:22,449 INFO L226 Difference]: Without dead ends: 118 [2020-10-27 01:19:22,451 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=148, Invalid=1658, Unknown=0, NotChecked=0, Total=1806 [2020-10-27 01:19:22,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-10-27 01:19:22,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 114. [2020-10-27 01:19:22,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-10-27 01:19:22,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 122 transitions. [2020-10-27 01:19:22,464 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 122 transitions. Word has length 77 [2020-10-27 01:19:22,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:19:22,464 INFO L481 AbstractCegarLoop]: Abstraction has 114 states and 122 transitions. [2020-10-27 01:19:22,464 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-27 01:19:22,464 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 122 transitions. [2020-10-27 01:19:22,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-10-27 01:19:22,465 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:19:22,465 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:19:22,465 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-10-27 01:19:22,465 INFO L429 AbstractCegarLoop]: === Iteration 45 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:19:22,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:19:22,466 INFO L82 PathProgramCache]: Analyzing trace with hash 546249107, now seen corresponding path program 10 times [2020-10-27 01:19:22,466 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:19:22,466 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [573749381] [2020-10-27 01:19:22,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:19:22,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:19:22,501 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:19:22,751 FATAL L256 erpolLogProxyWrapper]: Now shrinking...